The most common and most likely answer to this crossword clue is the 8 letter word HEATWAVE
H
E
A
T
W
A
V
E
More clues leading to the result HEATWAVE
- Gag about failed airline’s torrid spell
- Keep around a lot of water, flowing, in warm weather
- Hitch old airline’s admitted to in warm weather
- Eat with wife — have outside in warm spell
- Airline no longer involved in major effort in warm weather
- Bad weather endlessly around avenue. No!
- Would this hot spell raise sea temperature?
- Sultry weather Chuck absorbs at start of winter
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 HEATWAVE mean?
HEATWAVE noun- A period of very hot weather.