A note to chase something that might bring one’s blessing! (7)
I believe the answer is:
atishoo
'something that might bring one's blessing' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'a note to chase' is the wordplay.
'note' becomes 'ti' (musical note, as in do re mi so fa la ti do).
'to chase' becomes 'shoo' (I've seen this in another clue).
'a'+'ti'+'shoo'='ATISHOO'
Can you help me to learn more?
(Other definitions for atishoo that I've seen before include "Sound made on expiration" , "Sneezing sound" , "hay-fever sufferer may interject this" , "Sound of explosion" , "Word to be sneezed at" .)