Cuttingly, do they hush listeners? (6)

I believe the answer is:

shears

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'cuttingly do they' is the definition.
The definition suggests an adverb but the answer is not.

'hush listeners?' is the wordplay.
'hush' becomes 'sh' (both are used to tell someone to be quiet).
'listeners?' becomes 'ears' (body parts which listen).
'sh'+'ears'='SHEARS'

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(Other definitions for shears that I've seen before include "Large scissors for clipping sheep" , "Hedge cutting tool" , "Large scissors for shaving sheep" , "Garden cutters" , "Pruners" .)

I've seen this clue in the Evening Standard.

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