English batter Muslim rejected in kitchen, say (8)

'kitchen say' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'english batter muslim rejected' is the wordplay.
'english batter' becomes 'cook' (I can't justify this - if you can you should believe this answer much more).
'muslim' becomes 'Moor' (Moor is an example).
'rejected' says the letters should be written in reverse.
'moor' reversed gives 'room'.
'cook'+'room'='COOKROOM'

'in' is the link.

Can you help me to learn more?