Tramp wraps foot in towel (7)
I believe the answer is:
drifter
'tramp wraps' is the definition.
'drifter' can be an answer for 'tramp' (I've seen this before). I am not sure about the 'wraps' bit.
'foot in towel' is the wordplay.
'foot' becomes 'ft' (synonyms).
'in' is an insertion indicator.
'towel' becomes 'drier' (something which dries).
'ft' placed inside 'drier' is 'DRIFTER'.
Can you help me to learn more?
(Other definitions for drifter that I've seen before include "Wanderer; fishing vessel" , "Vagrant - fishing boat" , "Itinerant type" , "Fishing boat; wanderer" , "Ship - a tramp, possibly" .)