How witches see a cooker (5)
I believe the answer is:
coven
'how witches' is the definition.
'coven' can be an answer for 'witches' (a coven is a group of witches). I am not certain of the 'how' bit.
'see a cooker' is the wordplay.
'see' becomes 'C' (the word for the letter, according to Chambers).
'a cooker' becomes 'oven' (synonyms).
'c'+'oven'='COVEN'
Can you help me to learn more?
(Other definitions for coven that I've seen before include "enchanting women in group" , "Women's group" , "Some wise women" , "Witches' assembly" , "Witches' meeting" .)