Where schoolchildren bought food for friar's dance? (4-4)

'where schoolchildren bought food' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'friar's dance?' is the wordplay.
'friar's' becomes 'tuck's' (Friar Tuck).
'dance?' becomes 'hop' (hop is a kind of dance).
'tucks'+'hop'='TUCK-SHOP'

'for' acts as a link.

Can you help me to learn more?