Photos of work aboard ship (6)
I believe the answer is:
stills
'photos' is the definition.
(still is a kind of photo)
'work aboard ship' is the wordplay.
'work' becomes 'till' (tilling is a kind of working**).
'aboard' is an insertion indicator.
'ship' becomes 'ss'.
'till' placed inside 'ss' is 'STILLS'.
'of' is the link.
(Other definitions for stills that I've seen before include "Photos taken from a film" , "Alcohol producers" .)