One Billy Connolly might pick on at gig? (5)

I believe the answer is:

banjo

I'm a little stuck... Click here to teach me more about this clue!

'gig?' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for banjo that I've seen before include "something that's played on" , "Bluegrass instrument?" , "Stringed instrument with long neck" , "String instrument" , "Small plucked instrument" .)

I've seen this clue in The Sun.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.