Locker pays attention to main themes (8)

I believe the answer is:

keynotes

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

'main themes' is the definition.
'keynotes' can be an answer for 'themes' (keynote is a kind of theme). I am unsure of the 'main' bit.

'locker pays attention' is the wordplay.
'locker' becomes 'key' (I've seen this before).
'pays attention' becomes 'notes' (I've seen this before).
'key'+'notes'='KEYNOTES'

'to' is the link.

Can you help me to learn more?

(Other definitions for keynotes that I've seen before include "Main musical notes or underlying themes" , "Central principles" , "Principal themes, central ideas" , "Prevailing ideas" .)

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.