Arranged for Heath to follow strict diet (10)

'arranged' is the definition.
Both the answer and definition are adjectives. Perhaps you can see a link between them that I don't see?

'heath to follow strict diet' is the wordplay.
'heath' becomes 'Ted' (Ted Heath the former British Prime Minister).
'to follow' means one lot of letters go next to another.
'strict diet' becomes 'regimen' (a diet is a certain eating regimen. I am not sure about the 'strict' bit.).
'ted' put after 'regimen' is 'REGIMENTED'.

'for' acts as a link.

Can you help me to learn more?