Going round sacred trees (6)
I believe the answer is:
cedars
'trees' is the definition.
(cedar is a kind of tree)
'going round sacred' is the wordplay.
'going round' indicates an anagram.
'sacred' is an anagram of 'CEDARS'.
(Other definitions for cedars that I've seen before include "Strangely sacred trees" , "Aromatic trees" , "Trees with perfumed wood" , "Fragrant trees of the Lebanon" , "Sacred (anag) -- trees" .)