Sailor tucking into buffet at home (7)
I believe the answer is:
habitat
'home' is the definition.
(I've seen this before)
'sailor tucking into buffet at' is the wordplay.
'sailor' becomes 'ab' (abbreviation for able seaman).
'tucking into' indicates putting letters inside.
'buffet' becomes 'hit' (buffet can mean to beat or pound).
'ab' placed inside 'hit' is 'habit'.
'habit'+'at'='HABITAT'
(Other definitions for habitat that I've seen before include "Usual abode" , "home, naturally" , "Natural home and surroundings" , "Environment in which groups normally live" , "Surrender" .)