Revive Frenchman with whiskey (5)
I believe the answer is:
renew
'revive' is the definition.
(I've seen this before)
'frenchman with whiskey' is the wordplay.
'frenchman' becomes 'rene' (common French name).
'with' is a charade indicator (letters next to each other).
'whiskey' becomes 'W' (phonetic alphabet: alpha, bravo, charlie etc.).
'rene'+'w'='RENEW'
(Other definitions for renew that I've seen before include "Start afresh" , "Invigorate" , "Restore to original state" , "Reform" , "Give fresh life to" .)