Crossword Genius

Classify space for instruction (9)

Ross

I believe the answer is:

classroom

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'instruction' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

'classify space' is the wordplay.
'classify' becomes 'class' (synonyms).
'space' becomes 'room' (room is a kind of space).
'class'+'room'='CLASSROOM'

'for' acts as a link.

Can you help me to learn more?

(Other definitions for classroom that I've seen before include "School space" , "Where children learn" , "Lessons are learnt here" , "Teaching environment" , "Part of a school" .)

I've seen this clue in The Mirror.
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