Could Midge tolerate pet hate? (7)
I believe the answer is:
bugbear
'pet hate?' is the definition.
(I've seen this before)
'could midge tolerate' is the wordplay.
'could midge' becomes 'bug' (I am not sure about this - if you are sure you should believe this answer much more).
'tolerate' becomes 'bear' (synonyms).
'bug'+'bear'='BUGBEAR'
Can you help me to learn more?
(Other definitions for bugbear that I've seen before include "Cause of obsessive fear" , "something terrible" , "One's special fear" , "Cause of annoyance, fear" , "Cause of irritation" .)