Crossword Genius

Crazy times packing a gun? (5)

Ross

I believe the answer is:

barmy

'crazy' is the definition.
(I've seen this before)

'times packing a gun?' is the wordplay.
'times' becomes 'by' (both can mean 'multiplied by').
'packing' means one lot of letters goes inside another (some letters are packed inside).
'a gun?' becomes 'arm' (gun is a kind of arm).
'by' placed around 'arm' is 'BARMY'.

(Other definitions for barmy that I've seen before include "Crackers, daft" , "Mad; crazy" , "-- Army, cricket supporters" , "round the bend" , "Mad (like footballing "army")" .)

I've seen this clue in The Telegraph.
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