Big look around building (5)
I believe the answer is:
igloo
'building' is the definition.
(igloo matches up with the definition building)
'big look around' is the wordplay.
'around' says the answer is hidden in the clue.
'IGLOO' is hidden in the letters of 'big look'.
(Other definitions for igloo that I've seen before include "Inuit hut" , "Eskimo's home" , "native dwelling" , "northern home" , "Inuit shelter" .)