What does the cryptic crossword clue "Dupe a couple of boys (6)" mean?

The definition is "boys". The wordplay uses a charade (building blocks). VIC (synonym="VIC") + TIM (synonym="TIM") = VICTIM The answer is VICTIM.

Dupe a couple of boys (6)

Guardian Cryptic #26070 | 12 Across | 2013-10-04 flower