Be in charge of post at university (5)
I believe the answer is:
chair
'post at university' is the definition.
'chair' can be an answer for 'post' (I have seen 'academic post' mean 'chair' so perhaps 'post' could also mean 'chair'). I'm unsure of the 'at university' bit.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for chair that I've seen before include "Item of furniture (which can be addressed!)" , "Backed seat for one" , "academic office" , "Something with legs" , "Single seat" .)