Opening oven, tray's grabbed (4)
I believe the answer is:
vent
'opening' is the definition.
(vent is a kind of opening)
'oven tray's grabbed' is the wordplay.
'VENT' is hidden within the letters.
However, I am not sure how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for vent that I've seen before include "Discharge; give expression to" , "Give outlet as to feelings" , "Slit in the back of a jacket" , "Express freely as with emotions" , "Broadcast" .)