Ogling alternative lead singer at concerts (4)
I believe the answer is:
gigs
'concerts' is the definition.
(I know this)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for gigs that I've seen before include "Pop/jazz band engagements" , "One-night music sessions" , "One-night musical stands" , "One-night-stand musical performances" .)