Graduates bring it back on to this fortified place (7)
I believe the answer is:
bastion
'graduates bring it back on to this fortified place' is the definition.
'bastion' can be an answer for 'fortified place' (I've seen this before). I am not sure about the remainder of the definition.
'it back on to this fortified place' is the wordplay.
'back' says the letters should be written backwards.
'on' is an insertion indicator.
'to this fortified place' becomes 'bason' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'it' reversed gives 'ti'.
'ti' going into 'bason' is 'BASTION'.
Can you help me to learn more?
(Other definitions for bastion that I've seen before include "that's fortified" , "Strong defender" , "'Stronghold, citadel (7)'" , "part of stronghold" , "A projecting fortification to increase angle of fire" .)