I myself harangue about the clothing (7)
I believe the answer is:
raiment
'the clothing' is the definition.
(raiment is a kind of clothing)
'i myself harangue about' is the wordplay.
'myself' becomes 'me'.
'harangue' becomes 'rant' (synonyms).
'about' means one lot of letters goes inside another.
'i'+'me'='ime'
'ime' put inside 'rant' is 'RAIMENT'.
(Other definitions for raiment that I've seen before include "Especially fine or decorative clothing" , "Poetic word for clothing" , "Traditional clothing" , "Fancy clothes seen on minaret" , "Clobber" .)