Encourage a risk (4)

I believe the answer is:

abet

'encourage' is the definition.
(thesaurus)

'a risk' is the wordplay.
'risk' becomes 'bet'.
'a'+'bet'='ABET'

(Other definitions for abet that I've seen before include "Give aid to" , "Egg on" , "Help a criminal" , "Encourage or assist (someone) to commit crime" , "Make good" .)

I've seen this clue in The Telegraph.

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