Grasps the wise crafty asides (5,8)

I believe the answer is:

stage whispers

'asides' is the definition.
(stage whispers are spoken as asides on stage)

'grasps the wise crafty' is the wordplay.
'crafty' is an anagram indicator.
'grasps'+'the'+'wise'='graspsthewise'
'graspsthewise' anagrammed gives 'STAGE-WHISPERS'.

(Another definition for stage whispers that I've seen is " With intentional public leaks".)

I've seen this clue in The Telegraph.

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