Deprived of a swill of beer, going on foot (6)
I believe the answer is:
bereft
'deprived' is the definition.
(I've seen this before)
'a swill of beer going on foot' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'beer' is 'bere' which is within the answer.
'foot' could be 'ft' (abbreviation) and 'ft' is located in the answer.
No letters remain.
This explanation may well be incorrect...
'of' acts as a link.
Can you help me to learn more?
(Other definitions for bereft that I've seen before include "Deprived, say of reason" , "Sorrowful through loss" , "Pained by the loss of someone" , "Deprived, of reason or loved one" , "Having had something precious taken away" .)