Delighted to support cause that's ready to explode? (7-5)
I believe the answer is:
trigger-happy
'ready to explode?' is the definition.
I can't judge whether this definition defines the answer.
'delighted to support cause' is the wordplay.
'delighted' becomes 'happy' (I've seen this before).
'to' says to put letters next to each other (I've seen this in other clues).
'support cause' becomes 'trigger' (I can't justify this - if you can you should give a lot more credence to this answer).
'happy' after 'trigger' is 'TRIGGER-HAPPY'.
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for trigger-happy that I've seen before include "Over-enthusiastic with a gun" , "inclined to recklessness" , "Quick to use a gun" , "enjoying shooting" , "Irresponsible with firearms" .)