Furious when someone's stamped on your toe? (7,3)
I believe the answer is:
hopping mad
'furious' is the definition.
(I've seen this before)
'someone's stamped on your toe?' is the wordplay.
I cannot quite see how this works, but
'on' could be 'o' (I've seen this in other clues) and 'o' is found in the answer.
'someone' could be 'pi' (PI is an example) and 'pi' is found within the answer.
This may be the basis of clue (or it may be nonsense).
'when' is the link.
Can you help me to learn more?
(Other definitions for hopping mad that I've seen before include "Wild" , "Furious (as a frog?)" , "like a kangaroo?" , "Extremely angry (colloq.)" , "Very irate" .)