Spotted duke in Berlin dancing (7)

I believe the answer is:

brindle

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

'duke in berlin dancing' is the wordplay.
'duke' becomes 'd' (abbreviation).
'in' indicates putting letters inside.
'dancing' indicates an anagram.
'berlin' is an anagram of 'brinle'.
'd' placed inside 'brinle' is 'BRINDLE'.

Can you help me to learn more?

(Other definitions for brindle that I've seen before include "Streaky" , "Animal streaked" .)

I've seen this clue in The Times.

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