Warning given to golfer concerning sports shoe, is a sign of things to come (10)
I believe the answer is:
forerunner
'warning' is the definition.
(thesaurus)
'to golfer concerning sports shoe is a sign of things to come' is the wordplay.
I cannot quite understand how this works, but
'to' could be 'for' and 'for' is found in the answer.
'come' could be 'run' (running is a kind of coming) and 'run' is located in the answer.
This explanation may well be incorrect...
'given' acts as a link.
Can you help me to learn more?
(Other definitions for forerunner that I've seen before include "one coming ahead" , "Precursor" .)