Encouraged to be terribly rude about golf (5)
I believe the answer is:
urged
'encouraged' is the definition.
(I've seen this before)
'terribly rude about golf' is the wordplay.
'terribly' indicates an anagram.
'about' means one lot of letters goes inside another.
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'rude' with letters rearranged gives 'ured'.
'ured' enclosing 'g' is 'URGED'.
'to be' is the link.
(Other definitions for urged that I've seen before include "Egged on" , "Incited" , "Beseeched" , "Strongly recommended" , "Pressed" .)