Family keeps fifty pots fired here (4)
I believe the answer is:
kiln
'pots fired here' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'family keeps fifty' is the wordplay.
'family' becomes 'kin' (synonyms).
'keeps' means one lot of letters goes inside another.
'fifty' becomes 'L' (Roman numeral).
'kin' placed around 'l' is 'KILN'.
Can you help me to learn more?
(Other definitions for kiln that I've seen before include "Potter's Friend" , "Oven for firing bricks" , "Hops or pottery cooker?" , "Oven for hardening and drying" , "Furnace for firing bricks" .)