Connections for a cat, by the sound of it (5)
I believe the answer is:
links
'connections' is the definition.
('link' can be a synonym of 'connection')
'cat by the sound of it' is the wordplay.
'cat' becomes 'lynx' (lynx is a kind of cat).
'by the sound of it' shows a homophone (sound like).
'lynx' sounds like 'LINKS'.
'for a' is the link.
(Other definitions for links that I've seen before include "Bonds" , "Seaside golf course - parts of a chain" , "Connecting parts" , "provides connections to other websites" , "Joins on the golf course?" .)