Allow only some children -- a blessing! (6)

I believe the answer is:

enable

'allow' is the definition.
(thesaurus)

'only some children a blessing' is the wordplay.
'only some' says the answer is hidden in the clue.
'ENABLE' can be found hidden inside 'children a blessing'.

(Other definitions for enable that I've seen before include "Permit or facilitate" , "Allow" , "Render capable" , "Activate" , "Authorise" .)

I've seen this clue in The Telegraph.

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