Track and field where his cattle wander (9)
I believe the answer is:
athletics
'track and field' is the definition.
(thesaurus)
'his cattle wander' is the wordplay.
'wander' indicates an anagram.
'his'+'cattle'='hiscattle'
'hiscattle' anagrammed gives 'ATHLETICS'.
'where' is the link.
(Other definitions for athletics that I've seen before include "Oldham and Charlton?" , "Lithe acts observed in sporting contests" , "Track and field sports" , "Track and field events" , "Lithe acts performed in physical sports" .)