Neaten again and tick off (9)
I believe the answer is:
reprimand
'tick off' is the definition.
(thesaurus)
'neaten again and' is the wordplay.
I cannot really understand how this works, but
'again' could be 're' (prefix meaning 'again') and 're' is found in the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for reprimand that I've seen before include "telling off" , "Severe telling-off" , "Formal censure" , "Formal rebuke" , "Expression of disapproval" .)