Bowling legend with ball in sort of window demanding concessions (7,2,6)

I believe the answer is:

holding to ransom

'demanding concessions' is the definition.
(to hold to ransom can mean to exact concessions)

'bowling legend with ball in sort of window' is the wordplay.
'bowling legend' becomes 'Holding' (cricket bowler Michael Holding).
'with' is a charade indicator (letters next to each other).
'ball' becomes 'o' (O looks like a ball).
'in' means one lot of letters goes inside another.
'sort of window' becomes 'transom' ().
'o' put into 'transom' is 'toransom'.
'holding'+'toransom'='HOLDING TO RANSOM'

I've seen this clue in The Guardian.

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