Pip again in and you get angry (3,3)
I believe the answer is:
see red
'get angry' is the definition.
(synonyms)
'pip again in' is the wordplay.
'pip' becomes 'seed' (I've seen this before).
'again' becomes 're' (prefix meaning 'again').
'in' is an insertion indicator.
'seed' going around 're' is 'SEE RED'.
'and you' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for see red that I've seen before include "Lose temper like enraged bull" , "Become suddenly angry" , "Lose temper like angry bull" , "Grow furious" , "Become angry as bull might" .)