Rebukes from ship crossing Arctic (6)
I believe the answer is:
scolds
'rebukes' is the definition.
('scold' can be a synonym of 'rebuke')
'ship crossing arctic' is the wordplay.
'ship' becomes 'ss'.
'crossing' indicates putting letters inside.
'arctic' becomes 'cold' (similar in meaning).
'ss' placed around 'cold' is 'SCOLDS'.
'from' acts as a link.
(Other definitions for scolds that I've seen before include "Chides, reprimands" , "Dresses down" , "Nags - naggers" , "Tells off, rebukes" , "Censures, berates" .)