Tramp wrapping foot in towel? (7)

I believe the answer is:

drifter

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'tramp' is the definition.
(I've seen this before)

'wrapping foot in towel?' is the wordplay.
'wrapping' indicates putting letters inside.
'foot in' becomes 'ft' (synonyms. I am not sure about the 'in' bit.).
'towel?' becomes 'drier' (something which dries).
'ft' put inside 'drier' is 'DRIFTER'.

Can you help me to learn more?

(Other definitions for drifter that I've seen before include "Fishing boat; nomad" , "one unsettled" , "Itinerant type" , "Fishing-boat" , "Gadabout" .)

I've seen this clue in The Sun.

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