Make an attempt (3)

I think it could be either:

Which length description are you looking for?:

4,1,2

have a go

'make an attempt' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for have a go that I've seen before include "try to foil criminal" , "Attempt something" , "Try (to help stop criminal?)" , "Take a turn" , "Make an attempt" .)

I've seen this clue in The Times, The Independent and The Sun.

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