The most common and most likely answer to this crossword clue is the 3 letter word SSN which also is the latest solution we found used in LA Times in 1999.
ID source crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters | 
|---|---|---|
| SSN | 100 % | 3 | 
Words with a meaning similar to the clue: ID source
These words may or may not be a possible solution to this crosswords clue.- ssa
 - identifier
 - trace
 - anon
 - dna
 - ego
 - signature
 - idaho
 - label
 - ore
 - patch
 - ibid
 
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution