The most common and most likely answer to this crossword clue is the 3 letter word OSS which also is the latest solution we found used in New York Times in 2007.
CIA ancestor crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters | 
|---|---|---|
| OSS | 100 % | 3 | 
Words with a meaning similar to the clue: CIA ancestor
These words may or may not be a possible solution to this crosswords clue.- antecedent
 - ascendant
 - forebear
 - forefather
 - grandfather
 - parent
 - sire
 - avo
 - basic
 - elder
 - foreman
 - grandpa
 
Crossword Answer definitions
OSS noun- (representing dialect pronunciation) Horse.
 
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution