Ill-advised popgun wiseguy's packing (6)

I believe the answer is:

unwise

'ill-advised' is the definition.
('unwise' can be a synonym of 'ill-advised')

'popgun wiseguy's packing' is the wordplay.
'packing' says the answer is hidden in the clue.
'UNWISE' is hidden in the letters of 'popgun wiseguy'.

(Other definitions for unwise that I've seen before include "Ill-judged" , "Not sensible or prudent" , "Lacking sound judgement, maybe foolish" , "Not sensible, foolish" , "Foolhardy" .)

I've seen this clue in The Independent.

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