More bananas showing a higher number of speckles (7)

I believe the answer is:

dottier

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'number of speckles' is the definition.
Both the answer and definition are comparative adjectives. Perhaps they are linked in a way I don't understand?

I can't explain the remainder of the clue.

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(Other definitions for dottier that I've seen before include "Detroit (anag) - more eccentric" , "with even less reason" , "Crazier" , "less rational" , "more absurd" .)

I've seen this clue in The Telegraph.

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