It's true about a politician taking time to proclaim loudly (7)
I believe the answer is:
trumpet
'to proclaim loudly' is the definition.
(I've seen this before)
'it's true about a politician' is the wordplay.
'it' becomes 'e' ('e' can mean 'electronic' which is similar to 'IT').
'true' becomes 't' (this could be a standard abbreviation which I don't know about).
'about' says to put letters next to each other.
'a politician' becomes 'trump' (Donald Trump).
'e'+'t'='et'
'et' put after 'trump' is 'TRUMPET'.
'taking time' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for trumpet that I've seen before include "Metal wind instrument" , "Brass musical instrument" , "brassy type" , "Pert tum (anag.)" , "Orchestral or military instrument" .)