The most common and most likely answer to this crossword clue is the 8 letter word GENERATE
I've seen this crossword clue in The Daily Telegraph
G
E
N
E
R
A
T
E
More clues leading to the result GENERATE
- Make green tea that's going to pot
- Make to withdraw in secret, a renegade
- Create case for Trollope after classes
- Produce DNA sequence with speed
- Dined on fresh green produce
- Cause adopted by cadet, a renegade going the other way
- Make teenager upset
- Produce information on deserter found in the middle of Leek
- Produce a note to supplement information about retiring
- Create case for trade after classes
Buddy explains!

The straight part
We know that "produce" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case produce = generate.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 GENERATE mean?
GENERATE verb- To bring into being; give rise to.
- To produce as a result of a chemical or physical process.
- To procreate, beget.
- To form a figure from a curve or solid.
- To appear or occur; be generated.