Called up to manage golf (4)
I believe the answer is:
rung
'called up' is the definition.
(to ring is to call up on the phone)
'manage golf' is the wordplay.
'manage' becomes 'run' (I've seen this before).
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'run'+'g'='RUNG'
'to' acts as a link.
(Other definitions for rung that I've seen before include "Level in a hierarchy" , "Part of a ladder" , "Step up the ladder - called for" , "Telephoned" , "Crosspiece of a ladder" .)