Supporters surrounding Rolls Royce in search (6)
I believe the answer is:
ferret
'search' is the definition.
(ferreting is a kind of searching)
'supporters surrounding rolls royce' is the wordplay.
'supporters' becomes 'feet' (both can mean a base or foundation).
'surrounding' indicates putting letters inside.
'rolls royce' becomes 'rr'.
'feet' enclosing 'rr' is 'FERRET'.
'in' is the link.
(Other definitions for ferret that I've seen before include "Small fierce animal - good hunting rabbits" , "Assiduous searcher" , "Search around - domesticated polecat" , "Semi-domesticated polecat" , "Root around" .)