The most common and most likely answer to this crossword clue is the 7 letter word THERMAL
I've seen this crossword clue in Financial Times
T
H
E
R
M
A
L
More clues leading to the result THERMAL
- Warm weather Malta needs
- Happily, her malt is what can give winger a lift
- Short story about Channel island current
- Current putting Hamlet right off
- Royal starts to moan about libel after article produced by Heat
- Hot air from the group believing everything – almost everything
- Current account’s closure has Harlem in a frenzy
- Current actor finally stops playing Hamlet
- Another malaise partly relating to heat
- Current sort of underwear?
Buddy explains!

The straight part
We know that "Current" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case current = thermal.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 THERMAL mean?
THERMAL noun- A column of rising air in the lower atmosphere created by uneven heating of Earth's surface.
- (stone) To create a rough finish on stone by treating it with a high-temperature blow-torch.
- (gliding, often in the present participle) To fly an unpowered aircraft in a (thermal) column of rising air.
- Pertaining to heat or temperature.
- (fabric) Providing efficient insulation so as to keep the body warm.
- Caused or brought about by heat.
- (stone) Having a rough finish by treatment with a blow-torch.