Heart of policeman that might melt (3)

I believe the answer is:

ice

'that might melt' is the definition.
(ice might melt)

'heart of policeman' is the wordplay.
'heart of' indicates a hidden word.
'ICE' is hidden within 'policeman'.

(Other definitions for ice that I've seen before include "Diamond" , "Constituent of 2dn" , "such an age" , "Glaciate" , "Formality" .)

I've seen this clue in The Times.

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