Unhappy miscreant finally getting reprimand (7)
I believe the answer is:
tearful
'unhappy' is the definition.
(thesaurus)
'miscreant finally getting reprimand' is the wordplay.
'miscreant finally' becomes 't' (I can't explain this - if you can you should believe this answer much more).
'getting' is a charade indicator (letters next to each other).
'reprimand' becomes 'earful' (earful is a kind of reprimand).
't'+'earful'='TEARFUL'
Can you help me to learn more?
(Other definitions for tearful that I've seen before include "Inclined to cry" , "Lachrymose, blubbering" , "crying" , "emotional" , "visibly distressed" .)