The most common and most likely answer to this crossword clue is the 7 letter word EQUATOR
E
Q
U
A
T
O
R
More clues leading to the result EQUATOR
- Circle round the globe
- Circular line converted to square
- A torque, twisting, that has zero latitude
- Meeting of two halves is unusually quorate
- Heading away from square, cycling round to the Central Line
- Hesitation about ridiculous quota with zero latitude
- Poles are nowhere near this European cod quota, right?
- English quota made up right on the line
- English paper’s redhead dropped? No latitude there!
- A band going across Africa and many other places
Buddy explains!

The straight part
We know that "Imagined circle" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case imagined circle = equator.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 EQUATOR mean?
EQUATOR noun- (often “the Equator”) An imaginary great circle around the Earth, equidistant from the two poles, and dividing earth's surface into the northern and southern hemisphere.
- A similar great circle on any sphere, especially on a celestial body, or on other reasonably symmetrical three-dimensional body.
- The midline of any generally spherical object, such as a fruit or vegetable, that has identifiable poles.
- The celestial equator.