The most common and most likely answer to this crossword clue is the 8 letter word ENGENDER
I've seen this crossword clue in The Daily Telegraph
E
N
G
E
N
D
E
R
More clues leading to the result ENGENDER
- Precipitate sex after Englishman cleared out
- First off, humans must have sex to breed
- Create purpose in green movement
- Len’s uncovered facts on the German breed
- Occasion when English knight has sex?
- Cause General to board small boat heading off
- Produce objective to be held by new genre
- End green nonsense – bring it about!
- Make English bank lose pounds
- Cause of death inside green building
Buddy explains!

The straight part
We know that "Cause" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cause = engender.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 ENGENDER mean?
ENGENDER verb- To beget (of a man); to bear or conceive (of a woman).
- To give existence to, to produce (living creatures).
- To bring into existence (a situation, quality, result etc.); to give rise to, cause, create.
- To assume form; to come into existence; to be caused or produced.
- To copulate, to have sex.
- (critical theory) To endow with gender; to create gender or enhance the importance of gender.