Crossword Genius

Charge execs for advertising spaces (10)

Ross

I believe the answer is:

billboards

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

'charge execs' is the definition.
The definition suggests a plural noun which matches the answer.

'advertising spaces' is the wordplay.
'advertising' becomes 'billboard' (I've seen this before).
'spaces' becomes 's' (this could be a standard abbreviation which I don't know about).
'billboard'+'s'='BILLBOARDS'

'for' is the link.

Can you help me to learn more?

(Another definition for billboards that I've seen is " More than one hoarding".)

I've seen this clue in The Sunday Times and The Times.
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