What does the cryptic crossword clue "You may meet one, if coming up north more than once (4)" mean?

The wordplay uses a reversal. IF (reversal="IF") + NN (synonym="NN") = FINN The answer is FINN.

You may meet one, if coming up north more than once (4)

Guardian Cryptic #27359 | 4 Down | 2017-11-20 flower