The most common and most likely answer to this crossword clue is the 9 letter word REITERATE
I've seen this crossword clue in The Guardian
R
E
I
T
E
R
A
T
E
More clues leading to the result REITERATE
- Repeat fee European bank first set up
- Repeat has said writer worried
- Repeat ceremony, retaining energy and pace
- Film about computer age in popular culture finally gets repeat
- Once more, state of Eritrea reformed these extremists
- Repeat disturbance in Eritrea with tired and emotional leaders
- Keep stating price after backing European bank
- Repeat strange rite heartlessly, time after time
- Repeat row over European price
- State again raised European bank charge
Buddy explains!

The straight part
We know that "Keep stating" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case keep stating = reiterate.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 REITERATE mean?
REITERATE noun- A tree with vertical branches alongside the main trunk and which continue to grow upwards.
- To say or do (something) for a second time, such as for emphasis.
- To say or do (something) repeatedly.
- Reiterated; repeated.