Amount of flair on switching clubs (5)
I believe the answer is:
irons
'clubs' is the definition.
(I know this)
'amount of flair on switching' is the wordplay.
'amount of' indicates a hidden word (a certain amount of the clue).
'IRONS' can be found hidden inside 'flair on switching'.
(Other definitions for irons that I've seen before include "for old convict to wear" , "Metal-headed golfclubs" , "Metal leg shackles" , "Golf-clubs with metal heads" , "things for an evening out" .)