We'd be back lying on the grass in the morning (3)
I believe the answer is:
dew
'lying on the grass in the morning' is the definition.
I can't tell whether this definition defines the answer.
'we'd be back' is the wordplay.
'be back' says the letters should be written in reverse.
'wed' written backwards gives 'DEW'.
Can you help me to learn more?
(Other definitions for dew that I've seen before include "Early morning condensation" , "'The foggy, foggy - - ' (song)" , "Early freshness" , "Night fall of moisture" , "Moisture deposited overnight" .)