Crossword Genius

Zero cost for lecture (5)

Ross

I believe the answer is:

orate

'lecture' is the definition.
(I've seen this before)

'zero cost' is the wordplay.
'zero' becomes 'o'.
'cost' becomes 'rate' (rate is a kind of cost).
'o'+'rate'='ORATE'

'for' is the link.

(Other definitions for orate that I've seen before include "Talk pompously" , "Speaker may" , "Spout" , "Make a flowery speech" , "Erato (anag.)" .)

I've seen this clue in The Telegraph.
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