Mad when getting called into action (8)
I believe the answer is:
deranged
'mad' is the definition.
(I've seen this before)
'called into action' is the wordplay.
'called' becomes 'rang' (called on the phone).
'into' is an insertion indicator.
'action' becomes 'deed' (deed is a kind of action).
'rang' inserted within 'deed' is 'DERANGED'.
'when getting' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for deranged that I've seen before include "Mentally unbalanced" , "Lunatic" , "Crazy" , "bananas" , "Disordered, mentally perhaps" .)