13D

[olegrahl]

Another lousy prize Xword with undefined theme.
Done it, but why is "a short way to to a new school turns up in old document" magna carta?
I can see a trac(k) a n gam, but why is gam a school?
16 a, 14d pretty feeble, too.

[Captain2]

Which crossword are you referring to?

[bibblebub]

a gam is another word for a school of whales etc.

[dannyk13]

gam: To visit or converse with one another for social purposes www.achehtimes.com/wordwealth/a-z/g/gam.htm gam (2) (gam), n., v., gammed, gam·ming. –n. 1. a herd or school of whales. 2. Eastern New Eng., Naut. a social meeting, visit, or the like, as between whaling ...

[mallyh]

gam is a school of whales

[Oldred]

gam is a group of whales