Laid out with a gun, perhaps; not very lively (7)

I believe the answer is:

languid

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'not very lively' is the definition.
I can't tell whether this definition defines the answer.

'laid out with a gun' is the wordplay.
'out with' indicates an anagram (out can mean wrong or inaccurate).
'laid' mixed up with 'gun' gives 'LANGUID'.

'perhaps' acts as a link.

Can you help me to learn more?

(Other definitions for languid that I've seen before include "Listless (7)" , "Listless, lacking vigour" , "Sluggish" , "Weak from illness or fatigue" , "Lacking in vigour or vitality" .)

I've seen this clue in the Evening Standard.

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