Gold managed to turn direction, being most restricted (9)
I believe the answer is:
narrowest
'most restricted' is the definition.
'gold managed to turn direction' is the wordplay.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'managed' becomes 'ran' (both can mean organised or was in charge of).
'to turn' says the letters should be written in reverse.
'direction' becomes 'west' (compass direction).
'or'+'ran'='orran'
'orran' written backwards gives 'narro'.
'narro'+'west'='NARROWEST'
'being' acts as a link.
(Other definitions for narrowest that I've seen before include "Most slender" , "this escape most lucky" , "least with room to spread wings?" , "Slightest" , "Being most thin" .)