Crossword Genius

To perform on stage, I have to be brisk (6)

Ross

I believe the answer is:

active

'be brisk' is the definition.
(thesaurus)

'to perform on stage i have' is the wordplay.
'to perform on stage' becomes 'act' (I've seen this in another clue).
'i have' becomes 'I've' (contraction of 'I have').
'act'+'ive'='ACTIVE'

'to' is the link.

(Other definitions for active that I've seen before include "Not extinct (of volcano)" , "Mobile" , "Keeping busy, not lazy" , "kind of voice" , "Busy, energetic" .)

I've seen this clue in The Times.
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