Hide air-bed that's been delivered (3,3)
I believe the answer is:
lie low
'hide' is the definition.
(lying low is a kind of hiding)
'air-bed that's been delivered' is the wordplay.
I cannot really see how this works, but
'that's' could be 'ie' (abbreviation for 'id est', 'that is' in Latin) and 'ie' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for lie low that I've seen before include "don't show your face" , "Conceal oneself in recumbent posture?" , "Absent oneself from social contact (for a period)" , "Go to ground" , "Use bottom bunk, perhaps" .)