Booty I see lying back in bath (3,3)
I believe the answer is:
hot tub
'bath' is the definition.
(type of bath)
'booty i see lying back' is the wordplay.
'booty' becomes 'butt' (I can't explain this - if you can you should give a lot more credence to this answer).
'i see' becomes 'oh' (both can mean 'I understand').
'lying back' shows that the letters should be reversed in order.
'butt'+'oh'='buttoh'
'buttoh' backwards is 'HOT TUB'.
'in' is the link.
Can you help me to learn more?
(Other definitions for hot tub that I've seen before include "critical comment" , "Outdoor bath" , "Spa feature" , "Very warm bath" , "bathing facility" .)