What does the cryptic crossword clue "On two wings, Tories and DUP labouring (9)" mean?

The wordplay uses an anagram. anagram of TORIES DUP = DIPTEROUS The answer is DIPTEROUS.

On two wings, Tories and DUP labouring (9)

Guardian Cryptic #29426 | 21 Across | 2024-07-04 flower