Assimilate sailor's world? (6)
I believe the answer is:
absorb
'assimilate' is the definition.
('absorb' can be a synonym of 'assimilate')
'sailor's world?' is the wordplay.
'sailor's' becomes 'abs' (abbreviation for able seaman).
'world?' becomes 'orb' (I have seen 'The World' mean 'orb' so perhaps 'world' could also mean 'orb').
'abs'+'orb'='ABSORB'
(Other definitions for absorb that I've seen before include "Grip" , "Suck up or take in" , "Become imbued" , "Occupy the mind fully as good book will" , "Understand" .)