Cheers a new start to knowledge in reformed youth (5,3)
I believe the answer is:
thank you
'cheers' is the definition.
(I've seen this before)
'a new start to knowledge in reformed youth' is the wordplay.
'start' suggests taking the first letters.
'to' is a charade indicator (letters next to each other).
'knowledge' becomes 'k' (this could be a standard abbreviation which I don't know about).
'in' means one lot of letters goes inside another.
'reformed' indicates anagramming the letters.
The first letter of 'new' is 'n'.
'a'+'n'+'k'='ank'
'youth' anagrammed gives 'thyou'.
'ank' placed inside 'thyou' is 'THANK-YOU'.
Can you help me to learn more?
(Other definitions for thank you that I've seen before include "Concentional expression of appreciation" , "Conventional expression of gratitude" , "I appreciate that" , "I'm grateful" , "Much obliged!" .)