Wild cat reported in seaside golf course (5)
I believe the answer is:
links
'seaside golf course' is the definition.
(I've seen this before)
'wild cat reported' is the wordplay.
'wild cat' becomes 'lynx' (I've seen this before).
'reported' shows a homophone (sound like).
'lynx' sounds like 'LINKS'.
'in' is the link.
(Other definitions for links that I've seen before include "(Seaside) golf course - connections" , "Shore-side golf course - connects" , "Rings or loops of a chain" , "provides connections to other websites" , "Golf course by the sea" .)