Stun partially beside a fence (6)

I believe the answer is:

deafen

'stun' is the definition.
(thesaurus)

'partially beside a fence' is the wordplay.
'partially' says the answer is hidden in the clue.
'DEAFEN' can be found hidden inside 'beside a fence'.

(Other definitions for deafen that I've seen before include "Cause to lose the power of hearing" , "Render senseless" , "Need FA (anag.)" , "what heavy rock stars do?" , "Render hard of hearing" .)

I've seen this clue in The Sun.

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