Crossword Genius

One drawing on key material in accusation of remoteness (5,5)

Ross

I believe the answer is:

ivory tower

I'm a little stuck... Click here to teach me more about this clue!

'accusation of remoteness' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'one drawing on key material' is the wordplay.
'one drawing' becomes 'tower' (I've seen this before).
'on' says to put letters next to each other.
'key material' becomes 'ivory' (I've seen this in another clue).
'tower' after 'ivory' is 'IVORY TOWER'.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for ivory tower that I've seen before include "academic position" , "Academia (seen as secluded)" , "Seclusion from ordinary life" , "State of seclusion from worldly realities" .)

I've seen this clue in The Independent.
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