Make way for what's clouded up in the vapours (4)
I believe the answer is:
pave
'make way for' is the definition.
(I've seen this in another clue)
'up in the vapours' is the wordplay.
'up' says the letters should be written in reverse (in down clue: letters go upwards).
'in' indicates a hidden word.
'evap' is hidden within 'the vapours'.
'evap' reversed gives 'PAVE'.
'what's clouded' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for pave that I've seen before include "Put on a surface of stone slabs" , "Cover with flags" , "Cover with flagstones" , "Cover with flat stones" , "Surface with stone etc." .)