The most common and most likely answer to this crossword clue is the 8 letter word HEADSETS
I've seen this crossword clue in The Daily Telegraph
H
E
A
D
S
E
T
S
Buddy explains!
The straight part
We know that "They may help you to hear" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case they may help you to hear = headsets.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 HEADSETS mean?
HEADSETS noun- A pair of headphones or earphones, or a singular headphone or earphone, typically with an attached microphone.
- Any electronic device worn on the head.
- On a bicycle, the system of bearings that connects the fork to the frame.