Position of a bloomer (5)
I believe the answer is:
lotus
This clue is a double definition.
'position' is the first definition.
(lotus is a yoga position)
'a bloomer' is the second definition.
(flowers like the lotus bloom)
'of' is the link.
(Other definitions for lotus that I've seen before include "Plant promoting forgetfulness" , "TREE" , "One of the lilies" , "Tropical water-lily" , "Mythical fruit inducing dreamy state" .)