Delay robbery (4-2)
I believe the answer is:
hold-up
I believe this is a double definition.
'delay' is the first definition.
(I know that delay can be written as hold up)
'robbery' is the second definition.
(I know that robbery can be written as hold-up)
(Other definitions for hold-up that I've seen before include "Robbery with violence" , "Commit armed robbery or keep aloft" , "Robbery; cause of delay" , "A delay, or an armed robbery" , "Situation causing delay" .)