Crossword Genius

Whisker regularly plucked for tramp (4)

Ross

I believe the answer is:

hike

I'm a little stuck... Click here to teach me more about this clue!

This clue might be a double definition.

'whisker regularly plucked for' is the first definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'tramp' is the second definition.
(synonyms)

Can you help me to learn more?

(Other definitions for hike that I've seen before include "Long walk; big price rise" , "Walking tour" , "Increase cost" , "Jack" , "Travel by Shank's Mare" .)

I've seen this clue in The Independent.
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