Some corn whiskey dropped by Don (3)
I believe the answer is:
ear
'some corn' is the definition.
(an ear is a piece of corn)
'whiskey dropped by don' is the wordplay.
'whiskey' becomes 'W' (phonetic alphabet: alpha, bravo, charlie etc.).
'dropped by' indicates named letters should be taken away.
'don' becomes 'wear' (synonyms).
'wear' with 'w' taken away is 'EAR'.
(Other definitions for ear that I've seen before include "Aural organ" , "Spike (wheat)" , "Place for a plug" , "Shell-like; corn" , "Listener in the cornfield" .)