This young lady regrets getting lifts from this guy... (4)
I believe the answer is:
otis
'this young lady regrets getting lifts' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'from this guy' is the wordplay.
'from' becomes 'o' (I've seen this in other clues).
'this guy' becomes 'tis' (I can't justify this - if you can you should believe this answer much more).
'o'+'tis'='OTIS'
Can you help me to learn more?
(Other definitions for otis that I've seen before include "US inventor" , "Place of worship; side part of head" , "Company providing lifts" , "lift company" , "---- Redding, 1941-67, soul singer" .)