During war, a number of legit lawmen are heartlessly suffering (4,4,5)

I believe the answer is:

well meet again

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'during war a number' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'legit lawmen are heartlessly suffering' is the wordplay.
'heartlessly' means to remove the middle letters.
'suffering' indicates an anagram.
'are' with its centre removed is 'ae'.
'legit'+'lawmen'+'ae'='legitlawmenae'
'legitlawmenae' is an anagram of 'WELL MEET AGAIN'.

'of' is the link.

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