Clergymen having second thoughts about crime (7)

I believe the answer is:

parsons

'clergymen' is the definition.
(parson is a kind of clergyman)

'second thoughts about crime' is the wordplay.
'second thoughts' becomes 'ps' (as in a PS in a letter).
'about' means one lot of letters goes inside another.
'crime' becomes 'arson' (crime of illegally starting a fire).
'ps' going around 'arson' is 'PARSONS'.

'having' acts as a link.

(Another definition for parsons that I've seen is " Clergymen".)

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