Homeless person, very short, getting a financial allowance (7)
I believe the answer is:
vagrant
'homeless person' is the definition.
(I've seen this before)
'very short getting a financial allowance' is the wordplay.
'very short' becomes 'v' (common abbreviation; 'short' indicates a short form).
'getting' is a charade indicator (letters next to each other).
'financial allowance' becomes 'grant' (both can mean money given to someone. I am not sure about the 'financial' bit.).
'v'+'a'+'grant'='VAGRANT'
Can you help me to learn more?
(Other definitions for vagrant that I've seen before include "nomadic type" , "Beggar" , "Homeless wanderer" , "Unsettled person, a tramp" , "Wandering tramp" .)