Way out writer in French restaurant (6)
I believe the answer is:
bistro
'french restaurant' is the definition.
'bistro' can be an answer for 'restaurant' (bistro is a kind of restaurant). I am not certain of the 'french' bit.
'way out writer in' is the wordplay.
'way' becomes 'st' (abbreviation for street).
'out writer' becomes 'biro' (type of pen, something which writes. I am not sure about the 'out' bit.).
'in' indicates putting letters inside.
'st' going within 'biro' is 'BISTRO'.
Can you help me to learn more?
(Other definitions for bistro that I've seen before include "A small informal restaurant from France" , "Small informal French cafi" , "family concern perhaps" , "Eating place" , "Small restaurant - robs it (anag)" .)