The most common and most likely answer to this crossword clue is the 10 letter word COMMERCIAL
I've seen this crossword clue in Financial Times
C
O
M
M
E
R
C
I
A
L
More clues leading to the result COMMERCIAL
- Call regularly to keep order before old kingdom becomes profitable
- A couple of Charlies, 31, somehow gaining promotion
- Lucrative publicity
- Intended to make a profit from organised crime after a short time back in California
- Fuel stocks start to make crime sadly profitable
- Making money, millions, thanks to Sarkozy’s investment in fossil fuel
- Plug for tv?
- Spot description of a kind of trading H
Buddy explains!

The straight part
We know that "Lucrative/publicity" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case lucrative/publicity = commercial.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does COMMERCIAL mean?
COMMERCIAL noun- An advertisement in a common media format, usually radio or television.
- A commercial trader, as opposed to an individual speculator.
- Of or pertaining to commerce.
- (aviation) Designating an airport that serves passenger and/or cargo flights.
- (aviation) Designating such an airplane flight.