Crossword Genius

Short estimate written in log rarely reformed disreputable bunch (6,7)

Ross

I believe the answer is:

rogues gallery

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This clue might be a double definition.

'short' is the first definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?

'estimate written in log rarely reformed disreputable bunch' is the second definition.
The definition suggests a singular noun which matches the answer.

Can you help me to learn more?

(Other definitions for rogues gallery that I've seen before include "Mug collection" , "Criminal line-up" , "Collection of pictures of criminals" , "Collection of undesirables" , "Police collection of photos of known criminals" .)

I've seen this clue in The Telegraph.
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