Make known I am a constituent (6)
I believe the answer is:
impart
'make known' is the definition.
(synonyms)
'i am a constituent' is the wordplay.
'i am' becomes 'I'm' (contraction).
'a constituent' becomes 'part' (a part is a constituent of something).
'im'+'part'='IMPART'
(Other definitions for impart that I've seen before include "Convey information, make known" , "grant" , "Communicate (information)" , "Make known, relate" , "Reveal details" .)