Singer after success one needing lift (7)
I believe the answer is:
hitcher
'one needing lift' is the definition.
The definition suggests a singular noun which matches the answer.
'singer after success' is the wordplay.
'singer' becomes 'cher' (Cher is a US musician).
'after' means one lot of letters go next to another.
'success' becomes 'hit' (hit is a kind of success).
'cher' after 'hit' is 'HITCHER'.
Can you help me to learn more?
(Other definitions for hitcher that I've seen before include "traveller" , "one determined to get somewhere" , "I count on thumb" .)