Noble pile free to go round (4,4)
I believe the answer is:
life peer
'noble' is the definition.
(life peer is a kind of noble)
'pile free to go round' is the wordplay.
'to go round' indicates anagramming the letters.
'pile'+'free'='pilefree'
'pilefree' is an anagram of 'LIFE PEER'.
(Other definitions for life peer that I've seen before include "Person appointed to the House of Lords" , "House of Lords member whose title cannot be inherited" , "Member of House of Lords whose title is not hereditary" , "One legislates" , "House of Lords appointee" .)