Big look around construction (5)
I believe the answer is:
igloo
'construction' is the definition.
(igloo is a kind of construction)
'big look around' is the wordplay.
'around' indicates a hidden word.
'IGLOO' can be found hidden inside 'big look'.
(Other definitions for igloo that I've seen before include "Inuit shelter" , "Home made of blocks of snow" , "Arctic dwelling" , "Dome-shaped dwelling" , "Stacked blocks" .)