Writer acquiring street cafe (6)
I believe the answer is:
bistro
'cafe' is the definition.
(I've seen this before)
'writer acquiring street' is the wordplay.
'writer' becomes 'biro' (I've seen this before**).
'acquiring' means one lot of letters goes inside another.
'street' becomes 'st'.
'biro' enclosing 'st' is 'BISTRO'.
(Other definitions for bistro that I've seen before include "Small inexpensive eatery" , "somewhere to eat" , "Cafe/restaurant" , "family concern perhaps" , "Small French bar and restaurant" .)