Bureau sounding out new college after some time (6)
I believe the answer is:
agency
'bureau' is the definition.
('agency' can be a synonym of 'bureau')
'new college after some time' is the wordplay.
'new' becomes 'n'.
'college' becomes 'cy' (I am not sure about this - if you are sure you should believe this answer much more).
'after' says to put letters next to each other.
'some time' becomes 'age' (age is a kind of time).
'n'+'cy'='ncy'
'ncy' after 'age' is 'AGENCY'.
'sounding out' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
(Other definitions for agency that I've seen before include "Recruiters possibly" , "Employment bureau" , "Function of one who acts for another" , "Government unit - business providing services" , "Business organisation" .)