Short break in activity (6)
I believe the answer is:
hiatus
'short break in activity' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hiatus that I've seen before include "US hat I change for a break" , "chasm" , "Pause; discontinuity" , "Gap, interruption" , "A gap or lacuna" .)