The most common and most likely answer to this crossword clue is the 8 letter word HANDRAIL
I've seen this crossword clue in The Daily Telegraph
H
A
N
D
R
A
I
L
More clues leading to the result HANDRAIL
- Support worker seen on public transport
- With leader of ramble in bad weather, finds something to hold on to
- Give wading bird protection on flight?
- Support Paris’s main form of transport
- Aid to staying upright and finding shelter at last in inclement weather
- Bar to hold protest led by worker
- Rant after worker demands safety feature
- Labourer, one telling fibs over walking aid
- Grabbing support from helpline?
- Hard nail manufactured for Bannister
Buddy explains!

The straight part
We know that "safety feature" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case safety feature = handrail.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 HANDRAIL mean?
HANDRAIL noun- A rail which can be held, such as on the side of a staircase, ramp or other walkway, and serving as a support or guard.