What does the cryptic crossword clue "Boy threw up having applied small drop (7)" mean?

The wordplay uses a charade (building blocks). B (synonym="boy?") + LOBBED (synonym="threw up") = BLOBBED The answer is BLOBBED.

Boy threw up having applied small drop (7)

Guardian Cryptic #29520 | 1 Down | 2024-10-22 flower