Tailor Swift led by prince and idiots (4-4)

'idiots' is the definition.
('half-wit' can be a synonym of 'idiot')

'tailor swift led by prince' is the wordplay.
'tailor' is an anagram indicator (letters tailored or designed).
'led by' is a charade indicator (letters next to each other) (some letters go in front of others).
'prince' becomes 'hal' (Shakespearean nickname of Henry V when a prince).
'swift' is an anagram of 'fwits'.
'fwits' put after 'hal' is 'HALF-WITS'.

'and' is the link.