Crossword Genius

Patrol old mills for a lot of money (3,6)

Ross

I believe the answer is:

top dollar

'a lot of money' is the definition.
(top dollar means a high price)

'patrol old mills' is the wordplay.
'mills' indicates an anagram (letters mill or swarm around).
'patrol'+'old'='patrolold'
'patrolold' anagrammed gives 'TOP DOLLAR'.

'for' acts as a link.

(Other definitions for top dollar that I've seen before include "high price?" , "High(est) price" , "The highest sum paid" .)

I've seen this clue in The Independent.
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