Hunt, wearing nursing uniform, is a prickly individual (3,6)
I believe the answer is:
sea urchin
'a prickly individual' is the definition.
(sea urchins are prickly)
'hunt wearing nursing uniform' is the wordplay.
'hunt' becomes 'search' (synonyms).
'wearing' becomes 'in' (as in being 'in' certain clothes).
'nursing' indicates putting letters inside.
'uniform' becomes 'U' (phonetic alphabet: alpha, bravo, charlie etc.).
'search'+'in'='searchin'
'searchin' going around 'u' is 'SEA-URCHIN'.
'is' is the link.
(Other definitions for sea urchin that I've seen before include "spineless creature" , "Marine invertebrate with spikes" , "Marine creature with near-spherical spiny shell" , "A problem for barefoot dabblers" , "Marine animal with globular body" .)