What does the cryptic crossword clue "Seem likely to make a reasonable offer (3,4)" mean?

The wordplay uses a double definition. BID (synonym="BID") + FAIR (synonym="FAIR") = BIDFAIR The answer is BIDFAIR.

Seem likely to make a reasonable offer (3,4)

Guardian Cryptic #29210 | 15 Across | 2023-10-25 flower