Feeling sorry for one in Rolls Royce felt strange, unionist admitted (9)
I believe the answer is:
regretful
'feeling' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?
'sorry for one in rolls royce felt strange unionist admitted' is the wordplay.
I cannot really see how this works, but
'unionist' could be 'u' (abbreviation as in Democratic Unionist Party) and 'u' is found in the answer.
an anagram of 'felt' is 'etfl' which is located in the left over letters.
'for one' could be 'eg' (both can mean 'for example') and 'eg' is found in the answer.
'rolls' could be 'rr' (Rolls Royce) and 'rr' is found in the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for regretful that I've seen before include "Wishing something hadn't happened" , "Feeling guilt over something" , "Feeling remorse" , "Feeling sorry, repentant" , "Miss Otis was" .)