Many securing university position (5)
I believe the answer is:
lotus
'position' is the definition.
(lotus is a yoga position)
'many securing university' is the wordplay.
'many' becomes 'lots' (lots of something).
'securing' is an insertion indicator.
'university' becomes 'U' (abbreviation for university).
'lots' going around 'u' is 'LOTUS'.
(Other definitions for lotus that I've seen before include "Type of water lily" , "Cross-legged position adopted in yoga" , "Plant widely regarded as sacred" , "Mythical fruit inducing dreamy state" , "Large water lily" .)