The most common and most likely answer to this crossword clue is the 5 letter word USRDA which also is the latest solution we found used in New York Times in 2015.
Old FDA guideline crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters | 
|---|---|---|
| USRDA | 100 % | 5 | 
Words with a meaning similar to the clue: Old FDA guideline
These words may or may not be a possible solution to this crosswords clue.- pattern
 - handbook
 - direction
 - model
 - norms
 - rule
 - ruled
 - era
 - rubric
 - conform
 - counselling
 - directives
 
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution