GI sought by MPs (4)
I believe the answer is:
awol
'gi sought by mps' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for awol that I've seen before include "Truant (or just missing)" , "gone missing" , "Absent without leave (abbrev.)" , "Absent without permission, in short" , "Take unofficial leave (abbrev.)" .)