Crossword Genius

Many dogs missing summit (6)

Ross

I believe the answer is:

oodles

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'many' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for oodles that I've seen before include "Loosed among lots" , "Large indefinite number" , "'Lashings, heaps (6)'" , "Plenty" , "masses" .)

I've seen this clue in The Times.
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