Cryptic crossword clue
Evidence of leak keeps engineers stumped 7

The most common and most likely answer to this crossword clue is the 7 letter word FLOORED

I've seen this crossword clue in The Times
F
L
O
O
R
E
D

Buddy explains!

The straight part
We know that "stumped" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case stumped = floored.
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 FLOORED mean?

FLOORED verb
  1. To cover or furnish with a floor.
  2. To strike down or lay level with the floor; to knock down.
  3. (driving) To accelerate rapidly.
  4. To silence by a conclusive answer or retort.
  5. To amaze or greatly surprise.
  6. To finish or make an end of.
  7. To set a lower bound.

Latest crossword clues with full explanations