Longman Dictionary of Contemporary English
top-class
adjective
EXAMPLES FROM OTHER ENTRIES
▪ top-class hotels
▪ Berkeley needed to pay higher salaries to attract top-class faculty.
EXAMPLES FROM CORPUS
▪ A top-class goalkeeper is expected to be both courageous and consistent.
▪ Gary Lineker is another top-class striker who clings keenly on to boots he's enjoying a scoring spell with.
▪ She realised he could provide her with some top-class partners and she has made the best of them.
▪ Sometimes he got like that, fed up with top-class food and top-class poncey people.
▪ The most obvious is that with the addition of one top-class batsman, Warwickshire might well have levered the title from Essex.
▪ Vogts can not be accused of running away from top-class opposition.
Wiktionary
top-class
a. Of the highest quality
Usage examples of "top-class".
So we take a top-class mare, now in foal by the best sire, and we drive her a long way off and sell her at the end of the journey to some owner or trainer who is glad to get a fabulously bred foal for a fraction of what it would cost him at auction.