Crossword Genius

Inform closers for delicate negotiation, take pounds off? (9)

Ross

I believe the answer is:

enlighten

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

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

'closers for delicate negotiation take pounds off?' is the wordplay.
I cannot quite understand how this works, but
'delicate' could be 'light' (similar in meaning) and 'light' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for enlighten that I've seen before include "Provide illumination" , "Edify" , "Educate, inform" , "remove prejudice" , "Give knowledge to, inform" .)

I've seen this clue in The Independent.
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