Crossword Genius

Boast new governing power (5)

Ross

I believe the answer is:

crown

I'm a little stuck... Click here to teach me more about this clue!

'governing power' 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?

'boast new' is the wordplay.
'boast' becomes 'crow' (to crow about something is to boast about it).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'crow'+'n'='CROWN'

Can you help me to learn more?

(Other definitions for crown that I've seen before include "Monarch's headgear" , "Summit" , "Symbol of monarchy" , "Diadem" , "Royal headdress" .)

I've seen this clue in The Sun.
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