There is a total of 359 clues beginning with ef
- Efficiency symbols, in physics
 - Efficiency when starting a tennis point?
 - Efficient
 - Efficient and purposeful
 - Efficient employee
 - Efficient engine
 - Efficient kind of shopping
 - Efficient manufacturing process
 - Efficient manufacturing reduces it
 - Efficient method of pub-crawling?
 - Efficient one
 - Efficient PR method
 - Efficient pump
 - Efficient route
 - Efficient technique
 - Efficient type
 - Efficient wall decor for a steel vault?
 - Efficient way to work
 - Efficient, as a floor-care product
 - Efficient, wordwise
 - Efficient
 - Efficiently
 - Efficiently expressed, maybe
 - Efficiently stated, as a theorem
 - Efficiently
 - Effie Klinker's creator
 - Effie Klinker's friend
 - Effie or FiFi
 - Effie ___ (Sam Spade's secretary)
 - Effigies
 - Effigies
 - Effigy
 - Effigy of a sort
 - Effigy, eg
 - Effigy
 - Efflorescence
 - Effloresces
 - Effluence
 - Effluences
 - Effluent
 - Effluvia
 - Effluvia
 - Effluvium
 - Effluvium
 - Efflux
 - Efflux from Etna
 - Efflux
 - Effort
 - Effort a coach hopes their team will bring
 - Effort before the effort
 - Effort expenders
 - Effort from an Olympic city hopeful
 - Effort maker
 - Effort or impulse
 - Effort requiring no repeating: Slang
 - Effort taken
 - Effort that goes "Pfft!"
 - Effort that goes further than necessary
 - Effort to accomplish something
 - Effort to convince
 - Effort to equal others
 - Effort to get pop elected?
 - Effort to influence
 - Effort to resolve a dispute
 - Effort to spread particular doctrines
 - Effort to surpass
 - Effort to win
 - Effort toward a law degree
 - Effort toward peaceful settlement
 - Effort's reward, in school
 - Effort's reward?
 - Effort, in Arabic
 - Effort, in Essex
 - Effort, so to speak
 - Effort-maker
 - Effort
 - Effort: Colloq
 - Effortless
 - Effortless assimilation
 - Effortless charm
 - Effortless course
 - Effortless gait
 - Effortless high marks
 - Effortless learning procedure
 - Effortless manner
 - Effortless movement
 - Effortless pace
 - Effortless quality
 - Effortless stride
 - Effortless task
 - Effortless transition
 - Effortless victory
 - Effortless win
 - Effortless
 - Effortlessly
 - Effortlessly achieved
 - Effortlessly graceful
 - Effortlessly
 - Effortlessness
 - Effortlessness