Summoned with a beeper (5)
I believe the answer is:
paged
'summoned with a beeper' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for paged that I've seen before include "Called a name over a PA system" , "Called over a public address system" , "called by Speaker" , "Called to phone" , "Summoned over a PA system" .)