Grounded every other one for being AWOL, perhaps (4)
I believe the answer is:
gone
'grounded every other' is the definition.
I can't tell whether this defines the answer.
'one for being awol perhaps' is the wordplay.
'for' means one lot of letters go next to another (I've seen this in other clues).
'being awol perhaps' becomes 'g' (I can't explain this - if you can you should give a lot more credence to this answer).
'one' after 'g' is 'GONE'.
Can you help me to learn more?
(Other definitions for gone that I've seen before include "Departed or no longer available" , "... saga of 2's civil war" , "Departed or dead" , "Well in the past" , "Departed; used up" .)