One charge to get you very angry (5)
I believe the answer is:
irate
'very angry' is the definition.
(I've seen this in another clue)
'one charge' is the wordplay.
'one' becomes 'i' (Roman numeral).
'charge' becomes 'rate' (rate is a kind of charge).
'i'+'rate'='IRATE'
'to get you' is the link.
(Other definitions for irate that I've seen before include "Fuming" , "Spitting feathers" , "Angry, annoyed" , "Aggrieved" , "Angry - furious" .)