Separately as below (7)

I believe the answer is:

asunder

'separately' is the definition.
(thesaurus)

'as below' is the wordplay.
'below' becomes 'under' ('under' can be a synonym of 'below').
'as'+'under'='ASUNDER'

(Other definitions for asunder that I've seen before include "(Torn) apart" , "Into parts or pieces" , "separately" , "Apart (archaic)" , "Widely separated" .)

I've seen this clue in The Telegraph.

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