Little child conceals weapon in cooking pot (7)
I believe the answer is:
marmite
'cooking pot' is the definition.
'marmite' can be an answer for 'pot' (marmite is a kind of pot). I'm not certain of the 'cooking' bit.
'little child conceals weapon' is the wordplay.
'little child' becomes 'mite'.
'conceals' is an insertion indicator.
'weapon' becomes 'arm' (I've seen this before).
'mite' enclosing 'arm' is 'MARMITE'.
'in' is the link.
Can you help me to learn more?
(Other definitions for marmite that I've seen before include "polarising response" , "Savoury spread (which you either like or you don't)" .)