Bachelor relating to sheep — and to cattle? (6)
I believe the answer is:
bovine
'to cattle?' is the definition.
(cattle is a kind of bovine)
'bachelor relating to sheep' is the wordplay.
'bachelor' becomes 'b' (abbreviation e.g. BA=Bachelor of Arts).
'relating to sheep' becomes 'ovine' (I've seen this before).
'b'+'ovine'='BOVINE'
'and' acts as a link.
(Other definitions for bovine that I've seen before include "To do with cows, dull and stupid" , "Ox-like" , "Cowlike" , "Like cattle" , "dense" .)