The most common and most likely answer to this crossword clue is the 8 letter word KILOWATT
I've seen this crossword clue in Financial Times
K
I
L
O
W
A
T
T
More clues leading to the result KILOWATT
- Skirt round old temple displaying measure of power
- To walk, it needs varying amount of power
- Power of tot – I walk all over the place
- Two talk wildly about one measure for power
- Unit charged to the customer’s current account?
- Talk to WI about measure of power
- Powerful unit seen in the heart of brickworks
- Power unit almost depleted upon going inside gear box
Buddy explains!

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 KILOWATT mean?
KILOWATT noun- One thousand (103) watts.