Coin collector (4)
'coin collector' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for slot that I've seen before include "Hole for money" , "Lots (anag.)" , "Long narrow opening" , "Small opening, for a coin say" , "Scheduled time -- aperture for coins" .)
'coin collector' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I can't see?
This is the entire clue.
Can you help me to learn more?