Express demanding sacking of Conservative leader (7)
I believe the answer is:
declare
'express demanding sacking' is the definition.
'declare' can be an answer for 'express' (thesaurus). I'm unsure of the 'demanding sacking' bit.
'of conservative leader' is the wordplay.
'of' is an anagram indicator (the answer comes from or 'of' the letters).
'conservative' becomes 'C' (UK political abbreviation).
'c'+'leader'='cleader'
'cleader' with letters rearranged gives 'DECLARE'.
Can you help me to learn more?
(Other definitions for declare that I've seen before include "Announce formally" , "Announce; end innings" , "Make a statement, to customs perhaps" , "Aver, state" , "Make clearly known" .)