Crossword Genius

Custodian's ringful (4)

Ross

I believe the answer is:

keys

'custodian's ringful' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for keys that I've seen before include "Lock-openers?" , "Islands; piano parts" , "Low islands, sycamore fruits" , "Solutions" , "Bunch of openers?" .)

I've seen this clue in the New York Times.
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