Drunk on ship when entertaining the French (7)
I believe the answer is:
legless
'drunk' is the definition.
(I've seen this before)
'on ship when entertaining the french' is the wordplay.
'on' becomes 'leg' (cricket term, fielding positions).
'ship' becomes 'ss'.
'when entertaining' indicates putting letters inside.
'the french' becomes 'le'.
'leg'+'ss'='legss'
'legss' enclosing 'le' is 'LEGLESS'.
(Other definitions for legless that I've seen before include "very merry!" , "Drunk (as a worm?)" , "as a snake" , "Showing result of drinking" , "high" .)