Edward has three somehow restrained (8)
I believe the answer is:
tethered
'restrained' is the definition.
(I've seen this before)
'edward has three somehow' is the wordplay.
'edward' becomes 'ted'.
'has' is an insertion indicator.
'somehow' is an anagram indicator.
'three' with letters rearranged gives 'there'.
'ted' going around 'there' is 'TETHERED'.
(Other definitions for tethered that I've seen before include "Tied to something with a rope" , "on a leash" , "Fastened with rope or chain, like animal" , "limited movement" , "Restrained with a rope" .)