Snappy leader of business venture (5)
I believe the answer is:
brisk
'snappy' is the definition.
(I know that snappy can be written as brisk)
'leader of business venture' is the wordplay.
'leader of' suggests taking the first letters.
'venture' becomes 'risk' (risk is a kind of venture).
The initial letter of 'business' is 'b'.
'b'+'risk'='BRISK'
(Other definitions for brisk that I've seen before include "Lively, invigorating" , "Quick, active, energetic" , "Vigorous" , "Spry" , "Bustling" .)