The most common and most likely answer to this crossword clue is the 7 letter word CATHODE
C
A
T
H
O
D
E
More clues leading to the result CATHODE
- Initially checking out with death possibly terminal?
- Terminal at Heathrow, at first, is bound by convention
- Each dot dispersed by negative terminal
- Pet carrier has electronic conductor
- Each dot could be seen in old TV technology
- cheat terribly where positive charges are brought
- Positive terminal of battery has carbon, generating heat around centre of the body
- Terminal at Heathrow initially breaks rules
- Renovated Art Deco adorns hotel — beauty represented in set piece
Buddy explains!

The straight part
We know that "Positive terminal of battery" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case positive terminal of battery = cathode.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 CATHODE mean?
CATHODE noun- An electrode, of a cell or other electrically polarized device, through which a positive current of electricity flows outwards (and thus, electrons flow inwards). It usually, but not always, has a positive voltage.
- (by extension) The electrode at which chemical reduction of cations takes place, usually resulting in the deposition of metal onto the electrode.
- The electrode from which electrons are emitted into a vacuum tube or gas-filled tube.
- That electrode of a semiconductor device which is connected to the n-type material of a p-n junction.