One charge makes us angry (5)
I believe the answer is:
irate
'angry' is the definition.
(irate can mean angry or annoyed)
'one charge' is the wordplay.
'one' becomes 'i' (Roman numeral).
'charge' becomes 'rate' (rate is a kind of charge).
'i'+'rate'='IRATE'
'makes us' is the link.
(Other definitions for irate that I've seen before include "Annoyed, irritated" , "A tier (anag)" , "raging" , "Mad" , "Ticked off" .)