Seeing no sign of nerves in golf (8)
I believe the answer is:
noticing
'seeing' is the definition.
(I've seen this before)
'no sign of nerves in golf' is the wordplay.
'sign of nerves' becomes 'tic' (as in a nervous tic).
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'no'+'tic'+'in'+'g'='NOTICING'
(Other definitions for noticing that I've seen before include "Observing" , "Becoming aware of" , "Spotting" , "Remarking" , "Seeing, detecting" .)