They will keep on watch in the ship (8)
I believe the answer is:
stickers
'they' is the definition.
Both the answer and definition are plural nouns.
Maybe you can see an association between them that I can't see?
'keep on watch in the ship' is the wordplay.
I cannot really see how this works, but
'watch' could be 'ticker' (synonyms) and 'ticker' is located in the answer.
'ship' could be 'ss' (prefix in ship names eg SS Great Britain) and 'ss' is located in the leftover letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'will' is the link.
Can you help me to learn more?
(Other definitions for stickers that I've seen before include "Adhesive labels" , "Maybe notices" .)