Number clean out and scrub (6)
I believe the answer is:
cancel
'scrub' is the definition.
(thesaurus)
'number clean out' is the wordplay.
'number' becomes 'c' (C is an example**).
'out' indicates an anagram (out can mean wrong or inaccurate).
'clean' anagrammed gives 'ancel'.
'c'+'ancel'='CANCEL'
'and' is the link.
(Other definitions for cancel that I've seen before include "Go for an annulment" , "Delete" , "Scrub" , "Cross out or annul" , "Officially prevent happening" .)