Boils furiously in a hard scrap (7)
I believe the answer is:
abolish
'scrap' is the definition.
(I've seen this before)
'boils furiously in a hard' is the wordplay.
'furiously' indicates anagramming the letters.
'in' is an insertion indicator.
'hard' becomes 'h'.
'boils' is an anagram of 'bolis'.
'a'+'h'='ah'
'bolis' going within 'ah' is 'ABOLISH'.
(Other definitions for abolish that I've seen before include "Stop or put an end to" , "Quash" , "Formally do away with" , "Nullify" , "Put an end to, a rule perhaps" .)