Sad to have church involved in witchcraft (7)
I believe the answer is:
sorcery
'involved in witchcraft' is the definition.
'sorcery' can be an answer for 'witchcraft' (I've seen this in another clue). I'm not certain of the 'involved in' bit.
'sad to have church' is the wordplay.
'sad' becomes 'sorry' (synonyms).
'to have' means one lot of letters goes inside another.
'church' becomes 'CE' (Church of England).
'sorry' placed around 'ce' is 'SORCERY'.
Can you help me to learn more?
(Other definitions for sorcery that I've seen before include "practice being aligned with the devil?" , "Magic; witchcraft" , "occultism" , "spells etc?" , "Necromancy" .)