Fresh power to seize dollars (5)
I believe the answer is:
sassy
'fresh' is the definition.
(I know that fresh can be written as sassy)
'power to seize dollars' is the wordplay.
'power' becomes 'say' (I've seen this before).
'to seize' means one lot of letters goes inside another.
'dollars' becomes 'ss' (two S's - S resembles the dollar symbol).
'say' placed around 'ss' is 'SASSY'.
(Other definitions for sassy that I've seen before include "Cheeky (US colloq.)" , "Impertinent (US colloq.)" , "Pert" , "Bold, spirited, cheeky (Amer.)" , "(In US) saucy" .)