Doctor later calls for crystal dispenser

I believe the answer is:

saltcellar

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'crystal dispenser' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'doctor later calls' is the wordplay.
'doctor' is an anagram indicator.
'later'+'calls'='latercalls'
'latercalls' anagrammed gives 'SALTCELLAR'.

'for' acts as a link.

Can you help me to learn more?

(Other definitions for saltcellar that I've seen before include "Diner's sprinkler" , "Small table dish" , "Condiment shaker" .)

I've seen this clue in The Telegraph.

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