Ed's ever so upset when cut! (7)
I believe the answer is:
severed
'cut' is the definition.
(similar in meaning)
'ed's ever so upset' is the wordplay.
'ed's ever' anagrams to 'SEVERED'.
But, I'm unsure how this is indicated.
'when' acts as a link.
Can you help me to learn more?
(Other definitions for severed that I've seen before include "Detached" , "Bisected" , "parted" , "Deserve (anag.)" , "Split" .)