Vagrant recalled heading for Portobello market (5)
I believe the answer is:
tramp
'vagrant' is the definition.
(I've seen this before)
'recalled heading for portobello market' is the wordplay.
'recalled' shows that the letters should be reversed in order.
'heading for' suggests taking the first letters.
'market' becomes 'mart' (synonyms).
The initial letter of 'portobello' is 'p'.
'p'+'mart'='pmart'
'pmart' in reverse letter order is 'TRAMP'.
(Other definitions for tramp that I've seen before include "Walk heavily like hobo" , "I might hitch a lift" , "Disreputable wanderer" , "sometimes harboured?" , "Heavy footsteps" .)