Tramp? Patch up one with affected piety (9)
I believe the answer is:
mendicant
'tramp?' is the definition.
(thesaurus)
'patch up one with affected piety' is the wordplay.
'patch up' becomes 'mend'.
'one' becomes 'i' (Roman numeral).
'with' says to put letters next to each other.
'affected piety' becomes 'cant' (insincere sanctimonious talk).
'mend'+'i'+'cant'='MENDICANT'
(Other definitions for mendicant that I've seen before include "Begging" , "Beggar" .)