Forced into service when one was short of time (7)
I believe the answer is:
pressed
'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" .)