Nominally one wandering out West (4)
I believe the answer is:
owen
'nominally one wandering out west' is the definition.
The definition suggests a singular noun which matches the answer.
'one wandering out west' is the wordplay.
'wandering' indicates anagramming the letters.
'out' is an insertion indicator.
'west' becomes 'w' ('W' can be a synonym of 'west').
'one' anagrammed gives 'oen'.
'oen' going around 'w' is 'OWEN'.
Can you help me to learn more?
(Other definitions for owen that I've seen before include "Wilfred -, English poet killed in World War One" , "Wilfred - - , WW1 poet" , "Welsh industrialist and social reformer, founder of cooperative communities, d. 1858" , "Former SDP leader" , "Clive --, English actor" .)