The most common and most likely answer to this crossword clue is the 7 letter word AIRLIFT
I've seen this crossword clue in The Daily Telegraph
A
I
R
L
I
F
T
More clues leading to the result AIRLIFT
- Transport overhead if trial must be shifted
- If trail is vandalised, supplies by plane
- Companion leaving mountain transport to provide help from above
- Transport by rail perhaps, if time
- Emergency move up?
- Emergency procedure if trial goes wrong
- With 50% off, Trailfinders’ve arranged saving on flight?
- Barnet’s gone flat? You should ‘ave this emergency action
- Emergency transport from trial if in order
- What’s on some ‘eads? Stop emergency procedure
Buddy explains!

The straight part
We know that "emergency action" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case emergency action = airlift.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 AIRLIFT mean?
AIRLIFT noun- The transportation of troops, civilians or supplies by air, especially in an emergency.
- Such a flight.
- A pipe that is used to suck up objects from the sea bed.
- To transport (troops etc) in an airlift.