Notice performing? Exactly (6)
I believe the answer is:
spoton
'exactly' is the definition.
I know nothing about this answer so I can't judge whether this works.
'notice performing?' is the wordplay.
'notice' becomes 'spot' (spot can mean to notice or observe).
'performing?' becomes 'on' (as in being on stage).
'spot'+'on'='SPOTON'
Can you help me to learn more?
(Other definitions for spoton that I've seen before include "very accurate" , "precise" , "Exactly!" , "precisely what is needed" .)