What could make heartless man agree with partner? Something organised in advance (14)

I believe the answer is:

prearrangement

'something organised in advance' is the definition.
(something pre-arranged)

'what could make heartless man agree with partner?' is the wordplay.
'what could make' indicates an anagram.
'heartless' says to hollow out the word (remove centre letters).
'with' says to put letters next to each other.
'man' with its middle removed is 'mn'.
'mn'+'agree'='mnagree'
'mnagree' after 'partner' is 'partnermnagree'.
'partnermnagree' with letters rearranged gives 'PREARRANGEMENT'.

I've seen this clue in The Times.

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