Reprimand son, out of office (5)
I believe the answer is:
slate
'reprimand' is the definition.
(thesaurus)
'son out of office' is the wordplay.
'son' becomes 's'.
'out of office' becomes 'late' (I've seen this in other clues).
's'+'late'='SLATE'
(Other definitions for slate that I've seen before include "Metamorphic rock that can be split into thin layers" , "Grey metamorphic rock" , "Criticise - outdated school equipment" , "Roofing plate" , "Blast" .)