Possible Clues:

• Remembers 8 across from the odd sitcom is more my style
• Remembers 8 across from the odd sitcom and 21 down
• Keeps in mind more than one of those in 7 down, in a similar sense
• Remembers 8 across at unfinished station with 20 across
• Doesn't forget 8 across is from schoolbook? Or my novel!
• Learns cold