Hi Suse,
Welcome to A2K, It's nice to meet you!
I have the same answers as Dutchy for the two clues you are seeking help with.
7D. Hemingway = Ernest
'Ernest' can be found within the words 'pattERN ESTablished'
48A. Tollgate = Turnpike
roll = turn
fish = pike
Post again if you need any help Suse. Good luck in the competition!
Hope to talk to you again soon.
Regards, Butterfly