Two whiskeys, one not completely dry (3)
I believe the answer is:
wry
'dry' is the definition.
(synonyms)
'two whiskeys one not completely' is the wordplay.
'two whiskeys' can mean two replacements for 'whiskey'.
'whiskey' becomes 'W' (phonetic alphabet: alpha, bravo, charlie etc.).
'whiskey' becomes 'rye whiskey' (rye whiskey is a type of whiskey).
'one not completely' means to remove the last letter (the word is incomplete).
'rye' with its final letter taken away is 'ry'.
'w'+'ry'='WRY'
(Other definitions for wry that I've seen before include "Of humour, humorous and mocking" , "Ironically humorous" , "Of facial expression, mocking or twisted" , "Twisted out of shape like facial expression" , "Perverse" .)