Sailor wearing drunk's wooden shoe (5)
I believe the answer is:
sabot
'wooden shoe' is the definition.
(I've seen this before)
'sailor wearing drunk's' is the wordplay.
'sailor' becomes 'ab' (abbreviation for able seaman).
'wearing' is an insertion indicator.
'drunk' becomes 'sot' (both can mean someone who drinks too much).
'ab' going into 'sot' is 'SABOT'.
(Other definitions for sabot that I've seen before include "what's afoot?" , "Boast (anag) - shoe" , "French wooden shoe" , "Simple shoe" , "sole support?" .)