The most common and most likely answer to this crossword clue is the 10 letter word TRAMPOLINE
I've seen this crossword clue in The Daily Telegraph
T
R
A
M
P
O
L
I
N
E
More clues leading to the result TRAMPOLINE
- Spring up from vagrant, old and rank
- Bouncy oriental MP bounces on this
- Track about Jerry Springer may use this?
- Bouncer to bar artist and politician entering
- Gymnastic equipment sees work flipping between rails
- Bouncer using Circle Line after walk
- Later on I worried about member’s gymnastic apparatus
- Rails crossing river where pike may count in competition
- Jump on this passenger vehicle: European tours popular
- Vagrant with old profession as a bouncer
Buddy explains!

The straight part
We know that "bouncer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bouncer = trampoline.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 TRAMPOLINE mean?
TRAMPOLINE noun- A gymnastic and recreational device consisting of a piece of taut, strong fabric stretched over a steel frame using many coiled springs as anchors.
- Any of a variety of looping or jumping instructions in specific programming languages
- To jump as if on a trampoline.
- To rewrite (computer code) to use the looping or jumping instructions called trampolines.