Crossword Genius

Commercial endorsement (4)

Ross

I believe the answer is:

plug

'commercial endorsement' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for plug that I've seen before include "Wad of tobacco and electrical accessory" , "Power point" , "See 19" , "Stopper - connector" , "Promote" .)

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