A day in this place -- and start selling bonds (7)
I believe the answer is:
adheres
'bonds' is the definition.
('adhere' can be a synonym of 'bond')
'a day in this place and start selling' is the wordplay.
'a day' becomes 'ad' (I've seen this in other clues**).
'in this place' becomes 'here' ('here' can be a synonym of 'in this place').
'and' is a charade indicator (letters next to each other).
'start' says to take the initial letters.
The initial letter of 'selling' is 's'.
'ad'+'here'+'s'='ADHERES'
(Another definition for adheres that I've seen is " Sticks (like a stamp)".)