Crossword Genius

British commercial rubbish (3)

Ross

I believe the answer is:

bad

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

'rubbish' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

'british commercial' is the wordplay.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'commercial' becomes 'ad' (abbreviation for advertisement).
'b'+'ad'='BAD'

Can you help me to learn more?

(Other definitions for bad that I've seen before include "Severe; of low standard" , "(Of food) decayed" , "Wicked" , "Evil, below standard or off" , "Stinking" .)

I've seen this clue in The Sun.
Want a hint initially instead of a full solution? Install my app