Deprived of beer, perhaps, going on foot (6)
I believe the answer is:
bereft
'deprived' is the definition.
(I've seen this before)
'beer perhaps going on foot' is the wordplay.
'perhaps' indicates an anagram.
'going on' means one lot of letters go next to another.
'foot' becomes 'ft' (abbreviation).
'beer' with letters rearranged gives 'bere'.
'bere'+'ft'='BEREFT'
'of' acts as a link.
(Other definitions for bereft that I've seen before include "Deprived, perhaps of reason (6)" , "Sad through loss or deprivation" , "Having had something precious taken away" , "Deprived of or lacking something" , "Grieving from deprivation" .)