Blood around small shrub (5)
I believe the answer is:
gorse
'shrub' is the definition.
(gorse is a kind of shrub)
'blood around small' is the wordplay.
'blood' becomes 'gore' (gore means blood or violence).
'around' is an insertion indicator.
'small' becomes 's' (abbreviation - e.g. clothes size).
'gore' placed around 's' is 'GORSE'.
(Other definitions for gorse that I've seen before include "Prickly moorland plant" , "Prickly shrub, furze, whin" , "furs, say" , "Yellow-flowering shrub" , "I'm always blooming" .)