Look for a cause of inflation (3)
I believe the answer is:
air
I believe this is a double definition.
'look' is the first definition.
(something might have a certain air or look)
'cause of inflation' is the second definition.
(I've seen this in another clue)
'for a' is the link.
(Other definitions for air that I've seen before include "Atmosphere; appearance" , "Broadcast; tune" , "A melody or attitude" , "Broadcast j" , "'Tune, melody (3)'" .)