Heat magazine's contents, after modifying (10,5)
I believe the answer is:
qualifying round
'heat' is the definition.
(I've seen this before)
'magazine's contents after modifying' is the wordplay.
'magazine's contents' becomes 'round' (I can't explain this - if you can you should believe this answer much more).
'after' says to put letters next to each other.
'modifying' becomes 'qualifying' ('qualify' can be a synonym of 'modify').
'round' put after 'qualifying' is 'QUALIFYING ROUND'.
Can you help me to learn more?
(Another definition for qualifying round that I've seen is " Heat".)