Crossword Genius

Rent-collecting ministry was fast and effective (7)

Ross

I believe the answer is:

motored

'was fast and effective' is the definition.

'rent-collecting ministry' is the wordplay.
I cannot really understand how this works, but
'rent' could be 'tore' ('rend' and 'tear' both mean to rip something) and 'tore' is located in the answer.
'ministry' could be 'mod' (Ministry of Defence) and 'mod' is found in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...

I've seen this clue in The Times.
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