Seeking red left over (5,5)
I believe the answer is:
going spare
'seeking red' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'left over' is the wordplay.
'left' becomes 'going' (I can't explain this - if you can you should give a lot more credence to this answer).
'over' becomes 'spare' (I've seen this before).
'going'+'spare'='GOING SPARE'
Can you help me to learn more?
(Other definitions for going spare that I've seen before include "having been made redundant?" , "Getting angry" .)