Grill princess about blocking gross press (8)
I believe the answer is:
gridiron
'grill' is the definition.
(I know that grill can be written as gridiron)
'princess about blocking gross press' is the wordplay.
'princess about' becomes 'di' (I am not sure about this - if you are sure you should believe this answer much more).
'blocking' is an insertion indicator (to block can mean to plug a gap in something).
'gross' becomes 'gr' (abbreviation).
'press' becomes 'iron' (ironing is a kind of pressing).
'gr'+'iron'='griron'
'di' placed into 'griron' is 'GRIDIRON'.
Can you help me to learn more?
(Other definitions for gridiron that I've seen before include "cooking utensil" , "arrangement of bars" , "Frame over fire for cooking" , "Scene of American football" , "Grill - American football field" .)