Bishop left, having time for a roll (5)
I believe the answer is:
bagel
'roll' is the definition.
(bagel is a type of roll)
'bishop left having time' is the wordplay.
'bishop' becomes 'B' (chess abbreviation).
'left' becomes 'l' (common abbreviation).
'having' means one lot of letters goes inside another.
'time' becomes 'age' (an age is a period of time).
'b'+'l'='bl'
'bl' going around 'age' is 'BAGEL'.
'for a' acts as a link.
(Other definitions for bagel that I've seen before include "round fare" , "Jewish baked roll" , "Ring-shaped bread product" , "Ring-shaped bread roll" , "Toroidal bread roll" .)