Dishevelled British politician refers to place described by Homer (4)

I believe the answer is:

troy

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'homer' is the definition.
The definition and answer can be both quantities as well as being singular nouns.
Maybe they are linked in a way I don't understand?

I cannot understand how the remainder of the clue works.

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(Other definitions for troy that I've seen before include "Ancient city besieged by the Greeks" , "City impacted by long-term investment" , "Ancient city in Asia Minor" , "Hardy sergeant" , "Weight system - old city" .)

I've seen this clue in The Irish Times.

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