Positions organised by Cambridge college? (8)
I believe the answer is:
rankings
'positions' is the definition.
(ranking is a kind of position)
'organised by cambridge college?' is the wordplay.
'organised' becomes 'ran' (I've seen this before).
'by' means one lot of letters go next to another.
'cambridge college?' becomes 'kings' (I've seen this before).
'ran'+'kings'='RANKINGS'
(Other definitions for rankings that I've seen before include "Positions on a scale in relation to others" , "hierarchical scale" , "Places on scale of quality or value" .)