Record herd wandering round a shrub (7)
I believe the answer is:
ephedra
'shrub' is the definition.
(I know that ephedra is a type of shrub)
'record herd wandering round a' is the wordplay.
'record' becomes 'EP' (abbreviation for extended play record).
'wandering' is an anagram indicator.
'round' is an insertion indicator.
'herd' with letters rearranged gives 'hedr'.
'ep' put into 'hedr' is 'ephedr'.
'ephedr'+'a'='EPHEDRA'
(Other definitions for ephedra that I've seen before include "Source of asthma medication" , "desert plant" .)