Crossword Genius

… who got arrested by constable for having spots (6)

Ross

I believe the answer is:

blobby

'having spots' is the definition.

'who got arrested by constable' is the wordplay.
I cannot really see how this works, but
'by' is within the answer.
The remaining letters 'blob' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

'for' acts as a link.

(Other definitions for blobby that I've seen before include "with splashes of colour" , "Indistinctly round" , "Composed of viscous liquid drops" , "Indeterminate and roundish in shape" , "Spotty" .)

I've seen this clue in The Guardian.
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