Inject a booster containing forbidden stuff (6)

I believe the answer is:

taboos

I'm a little stuck... Click here to teach me more about this clue!

'inject a booster containing forbidden stuff' is the definition.
I can't judge whether this definition defines the answer.

'inject a booster containing' is the wordplay.
'containing' indicates a hidden word (I've seen 'contained' mean this).
'TABOOS' can be found hidden inside 'inject a booster'.

Can you help me to learn more?

(Other definitions for taboos that I've seen before include "Prohibitions buy custom or religion" , "They're forbidden by religion or social custom" , "Superstitious bans or prohibitions" , "No-nos" , "Prejudices that prohibit the mention of something" .)

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.