Wanderer bathes old woman in green light (5)
I believe the answer is:
nomad
'wanderer' is the definition.
(I know that Nomad is a type of wanderer)
'old woman in green light' is the wordplay.
'old woman' becomes 'ma' (both can mean someone's mother).
'in' indicates putting letters inside.
'green light' becomes 'nod' (I've seen this before).
'ma' inserted inside 'nod' is 'NOMAD'.
'bathes' acts as a link.
This may not be correct. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for nomad that I've seen before include "Itinerant" , "Person wandering" , "being domestically unstable" , "one must move on" , "Damon (anag.)" .)