Crossword Genius

A lot of people in service (4)

Ross

I believe the answer is:

mass

I believe this clue is a double definition.

'a lot of people' is the first definition.
(mass of people)

'service' is the second definition.
(church service)

'in' acts as a link.

(Other definitions for mass that I've seen before include "Get together" , "Bulk - RC service" , "Total" , "13 [BULK]" , "seasonal midnight service?" .)

I've seen this clue in The Guardian.
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