Have company put in antifouling (9)
I believe the answer is:
entertain
'have company' is the definition.
(I've seen this before)
'in antifouling' is the wordplay.
I cannot quite see how this works, but
'in' is present in the answer.
This may be the basis of clue (or it may be nonsense).
'put' is the link.
Can you help me to learn more?
(Other definitions for entertain that I've seen before include "Amuse or take into consideration" , "harbour" , "Wine and dine" , "Have a mind to - have a party" , "Welcome" .)