Range of gold section (5)
I believe the answer is:
orbit
'range' is the definition.
(synonyms)
'gold section' is the wordplay.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'section' becomes 'bit' (both can mean part).
'or'+'bit'='ORBIT'
'of' is the link.
(Other definitions for orbit that I've seen before include "Circling path" , "Revolve round" , "Planet's track" , "Lunar trajectory" , "Field of influence" .)