Baker, having finished, runs out at noon (4)
I believe the answer is:
oven
'baker' is the definition.
'finished runs out at noon' is the wordplay.
'finished' becomes 'over' ('over' can be similar in meaning to 'finished').
'runs' becomes 'r' (cricket abbreviation).
'out' is a deletion indicator.
'at' means one lot of letters go next to another.
'noon' becomes 'n'.
'over' with 'r' taken away is 'ove'.
'ove'+'n'='OVEN'
'having' acts as a link.
(Other definitions for oven that I've seen before include "Chamber for baking" , "You can cook in this" , "Kiln, cooker" , "Compartment for baking" , "Small furnace" .)