Lets run after Frenchman thaws (5)

I believe the answer is:

melts

'thaws' is the definition.
('melt' can be a synonym of 'thaw')

'lets run after frenchman' is the wordplay.
'run' indicates anagramming the letters.
'after' is a charade indicator (letters next to each other).
'frenchman' becomes 'm' (abbreviation for Monsieur).
'lets' with letters rearranged gives 'elts'.
'elts' put after 'm' is 'MELTS'.

I've seen this clue in The Mirror.

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