Sailor coming into boozer finding shoe (5)
I believe the answer is:
sabot
'shoe' is the definition.
(I know that sabot is a type of shoe)
'sailor coming into boozer' is the wordplay.
'sailor' becomes 'ab' (abbreviation for able seaman).
'coming into' is an insertion indicator.
'boozer' becomes 'sot' (both can mean an alcoholic).
'ab' put within 'sot' is 'SABOT'.
'finding' is the link.
(Other definitions for sabot that I've seen before include "what's afoot?" , "French wooden shoe" , "Carved shoe -- boats (anag)" , "sole support?" , "footwear from Paris" .)