In danger perhaps, no longer maintaining position (7)
I believe the answer is:
exposed
'in danger perhaps' is the definition.
I can't tell whether this defines the answer.
'no longer maintaining position' is the wordplay.
'no longer' becomes 'ex' (prefix meaning former or onetime).
'maintaining position' becomes 'posed' (I can't justify this - if you can you should give a lot more credence to this answer).
'ex'+'posed'='EXPOSED'
Can you help me to learn more?
(Other definitions for exposed that I've seen before include "Unmasked, revealed" , "Like a dummy" , "at mercy of weather" , "Not covered" , "Without protection" .)