Batting: sound job, to a great extent (2,4,4)
I believe the answer is:
in good part
'to a great extent' is the definition.
(I've seen this in another clue)
'batting sound job' is the wordplay.
'batting' becomes 'in' (as in batting or being 'in' in cricket).
'sound' becomes 'good' (associated in meaning).
'job' becomes 'part' (both can mean a role).
'in'+'good'+'part'='IN GOOD PART'
I've seen this clue in The Telegraph.
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