Large craft conveying capers (5)

I believe the answer is:

larks

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'capers' is the definition.
(I've seen this in another clue)

'large craft conveying' is the wordplay.
'large' becomes 'L' (eg in clothes sizes).
'craft conveying' becomes 'arks' (I am not sure about this - if you are sure you should believe this answer much more).
'l'+'arks'='LARKS'

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(Other definitions for larks that I've seen before include "early risers?" , "Birds; fun" , "Frolics" , "Early birds" , "High jinks" .)

I've seen this clue in The Guardian.

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