Jazz fan hanging round about -- I have to be artistic (8)
I believe the answer is:
creative
'be artistic' is the definition.
(I've seen this before)
'jazz fan hanging round about i have' is the wordplay.
'jazz fan' becomes 'cat' (I've seen this before).
'hanging round' indicates putting letters inside.
'about' becomes 're' (common abbreviation for 'with reference to').
'i have' becomes 'ive'.
'cat' enclosing 're' is 'creat'.
'creat'+'ive'='CREATIVE'
'to' acts as a link.
(Other definitions for creative that I've seen before include "Showing imagination" , "Showing originality" , "Innovative in reactive way" , "Full of ideas" , "Having the power to be original" .)