Neatness in using a word erroneously? (5)
I believe the answer is:
order
'neatness' is the definition.
(thesaurus)
'in using a word erroneously?' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ORDER' can be found hidden inside 'using word erroneously'.
(Other definitions for order that I've seen before include "Rank" , "Mr Speaker's plea" , "Family - group - arrangement" , "Tidiness - that's a command" , "Call" .)