Discipline husband, as well as fool to start with (4,2,4)

'discipline' is the definition.
(thesaurus)

'husband as well as fool to start with' is the wordplay.
'husband' becomes 'h' (abbreviation).
'as well as' becomes 'and' (I've seen this in another clue).
'fool' becomes 'takein' (synonyms).
'to start with' says to put letters next to each other.
'h'+'and'='hand'
'hand' after 'takein' is 'TAKE IN HAND'.