Plant university lecturer goes round with priest (9)
I believe the answer is:
dandelion
'plant' is the definition.
(dandelion is a kind of plant)
'university lecturer goes round with priest' is the wordplay.
'university lecturer' becomes 'don' (don can mean an academic - especially at Oxbridge).
'goes round' means one lot of letters goes inside another.
'with' becomes 'and'.
'priest' becomes 'eli' (biblical figure).
'and'+'eli'='andeli'
'don' enclosing 'andeli' is 'DANDELION'.
(Other definitions for dandelion that I've seen before include "Common yellow-flowered plant" , "Common yellow-flowered weed" , "Wild flower with serrated leaves" , "Weed with deeply incised leaves" , "Flower with a "clock"" .)