Tramp got back: about time (6)
I believe the answer is:
toerag
'tramp' is the definition.
(toerag originally referred to a beggar)
'got back about time' is the wordplay.
'back' shows that the letters should be reversed in order.
'about' means one lot of letters goes inside another.
'time' becomes 'era' (era is a kind of time).
'got' backwards is 'tog'.
'tog' placed around 'era' is 'TOERAG'.
(Other definitions for toerag that I've seen before include "O, great! (anag) -- a worthless fellow" , "Squirt" , "Despicable character" , "Despicable chap" , "Contemptible person (colloq.)" .)