The most common and most likely answer to this crossword clue is the 7 letter word AERIALS
I've seen this crossword clue in Independent
A
E
R
I
A
L
S
More clues leading to the result AERIALS
Buddy explains!

The straight part
We know that "receivers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case receivers = aerials.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 AERIALS mean?
AERIALS noun- A rod, wire, or other structure for receiving or transmitting radio, television signals etc.
- A move, as in dancing or skateboarding, involving one or both feet leaving the ground.
- Aerial photography.