Not the longest part of an aggressive speech (9)
I believe the answer is:
broadside
'an aggressive speech' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'not the longest part' is the wordplay.
I cannot really see how this works, but
'not' could be 'o' (I've seen this in other clues) and 'o' is found within the answer.
'part' could be 'side' (side is a kind of part) and 'side' is found in the answer.
The remaining letters 'brad' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for broadside that I've seen before include "criticism" , "Fierce verbal attack" , "Strongly critical verbal attack" , "barrage" , "Strong verbal attack on sideboard" .)