Huge robin moved about on roof area (13)
I believe the answer is:
neighbourhood
'area' is the definition.
(neighbourhood is a kind of area)
'huge robin moved about on roof' is the subsidiary indication.
'moved about' is an anagram indicator.
'on' is a charade indicator (letters next to each other).
'roof' becomes 'hood' (hood is a kind of roof).
'huge'+'robin'='hugerobin'
'hugerobin' with letters rearranged gives 'neighbour'.
'neighbour'+'hood'='neighbourhood'
(Other definitions for neighbourhood that I've seen before include "Manor" , "Community" , "Safety-in-the-locality scheme" , "Vicinity" , "Locality" .)