Old reports about Ursula's first bloomers (7)
I believe the answer is:
annuals
'bloomers' is the definition.
(annually blooming plants)
'old reports about ursula's first' is the wordplay.
'old reports' becomes 'annals' (historical records).
'about' indicates putting letters inside.
'first' says to take the initial letters.
The initial letter of 'ursulas' is 'u'.
'annals' going around 'u' is 'ANNUALS'.
(Other definitions for annuals that I've seen before include "Yearly publications" , "Yearbooks" , "Books published once a year" , "Yearly plants" , "Plants that have only one season" .)