Lachie confused about model being honourable? (7)
I believe the answer is:
'honourable?' is the definition.
'lachie confused about model' is the wordplay.
'confused' indicates an anagram.
'about' is an insertion indicator.
'model' becomes 't' (Ford Model T car).
'lachie' is an anagram of 'ehical'.
'ehical' going around 't' is 'ETHICAL'.
'being' is the link.
(Other definitions for ethical that I've seen before include "Moral, honest", "Morally good or correct", "At Chile (anag.)", "Moral, principled", "not advertised to the general public".)