Contrive once more to render rhino safe (9)
I believe the answer is:
refashion
'contrive once more' is the definition.
(to re-fashion is to contrive or form again)
'render rhino safe' is the wordplay.
'render' indicates anagramming the letters (I've seen 'rendering' mean this).
'rhino'+'safe'='rhinosafe'
'rhinosafe' anagrammed gives 'REFASHION'.
'to' acts as a link.
(Other definitions for refashion that I've seen before include "Make new" , "Alter design" , "Transform" .)