What does the cryptic crossword clue "Spit on pineapple in rage (2,7)" mean?

The wordplay uses a charade (building blocks). GOB (synonym="spit") + ANANAS (synonym="pineapple") = GO BANANAS The answer is GO BANANAS.

Spit on pineapple in rage (2,7)

Times Cryptic #28708 | 8 Down | 2023-09-14 flower