Old ladies eating good soft rock? (5)
I believe the answer is:
magma
'soft rock?' is the definition.
(I've seen this in another clue)
'old ladies eating good' is the wordplay.
'old ladies' becomes 'mama' (I can't justify this - if you can you should give a lot more credence to this answer).
'eating' indicates putting letters inside.
'good' becomes 'g' (abbreviation).
'mama' enclosing 'g' is 'MAGMA'.
Can you help me to learn more?
(Other definitions for magma that I've seen before include "Hot molten rock" , "Hot material" , "hot stuff" , "Molten rock in the earth's crust" , "Hot fluid rock" .)