Forger sends money in two holdalls first of all (5)
I believe the answer is:
smith
'forger' is the definition.
(I've seen this before)
'sends money in two holdalls first of all' is the wordplay.
'first of all' suggests taking the first letters.
The initial letters of 'sends money in two holdalls' is 'SMITH'.
(Other definitions for smith that I've seen before include "Common English surname" , "Black . . . . . or gun . . . . ." , "See 14" , "Common family name" , "Commonest name" .)