What does the cryptic crossword clue "It affects sheep, as price is variable (7)" mean?

The wordplay uses an anagram. anagram of AS (synonym="AS") + PRICE (synonym="PRICE") = SCRAPIE The answer is SCRAPIE.

It affects sheep, as price is variable (7)

Guardian Cryptic #29287 | 27 Across | 2024-01-24 flower