Expert takes a look at wild ox (7)
I believe the answer is:
buffalo
'wild ox' is the definition.
(I've seen this before)
'expert takes a look' is the wordplay.
'expert' becomes 'buff' (I've seen this before).
'takes' says to put letters next to each other.
'look' becomes 'lo'.
'buff'+'a'+'lo'='BUFFALO'
'at' acts as a link.
(Other definitions for buffalo that I've seen before include "creature" , "Large wild ox" , "Bill hunted them down" , "Wild cattle" , "US bison - upstate New York port" .)