Look behind, around, above (5)
I believe the answer is:
aloft
'above' is the definition.
(thesaurus)
'look behind around' is the wordplay.
'look' becomes 'lo' ('lo' is an archaic exclamation meaning 'look!').
'behind' becomes 'aft' (aft means towards or at the end of a ship).
'around' is an insertion indicator.
'lo' inserted within 'aft' is 'ALOFT'.
(Other definitions for aloft that I've seen before include "In the rigging, up high" , "Heading for heaven" , "To great height" , "Up in the air, high above" , "In the air, overhead" .)