Israeli secret service (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
mossad
'israeli secret service' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for mossad that I've seen before include "Israeli intelligence agency" , "Foreign intelligence agency" , "Israeli intelligence organisation" , "Israeli secret service" , "Agents" .)