Lying back, soaks in hot and steamy state (4)
I believe the answer is:
stew
'hot and steamy state' is the definition.
'lying back soaks' is the wordplay.
'lying back' says the letters should be written backwards.
'soaks' becomes 'wets'.
'wets' in reverse letter order is 'STEW'.
'in' acts as a link.
(Other definitions for stew that I've seen before include "Fret" , "Wet food for wets" , "Simmer" , "Go West for this dish" , "Dish of meat and mixed vegetables" .)