Crossword Genius

Forced into service when one was short of time (7)

Ross

I believe the answer is:

pressed

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'forced' is the definition.
(press can mean to force or coerce)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for pressed that I've seen before include "Coerced" , "under some strain" , "in a big hurry" , "crushed juice" , "Forced" .)

I've seen this clue in The Globe and Mail.
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