Removes clothes on excursion in ship? (6)
I believe the answer is:
strips
'removes clothes' is the definition.
(I've seen this before)
'excursion in ship?' is the wordplay.
'excursion' becomes 'trip' (I've seen this before).
'in' means one lot of letters goes inside another.
'ship?' becomes 'SS' (prefix in ship names eg SS Great Britain).
'trip' placed into 'ss' is 'STRIPS'.
'on' is the link.
(Other definitions for strips that I've seen before include "Long narrow pieces" , "Bands" , "Peels off" , "Undresses" , "Removes clothes" .)