Flourish of trumpets at the start — king entering queen's home (6)
I believe the answer is:
thrive
'flourish' is the definition.
(synonyms)
'trumpets at the start king entering queen's home' is the wordplay.
'at the start' says to take the initial letters.
'king' becomes 'R' (abbreviation for rex, king in Latin).
'entering' indicates putting letters inside.
'queen's home' becomes 'hive' (as in a queen bee).
The first letter of 'trumpets' is 't'.
'r' placed within 'hive' is 'hrive'.
't'+'hrive'='THRIVE'
'of' is the link.
(Other definitions for thrive that I've seen before include "Do well, flourish" , "Develop well" , "Succeed" , "Prosper, flourish" , "Boom" .)