The most common and most likely answer to this crossword clue is the 6 letter word TANDEM
I've seen this crossword clue in Independent
T
A
N
D
E
M
More clues leading to the result TANDEM
- Vehicle hit them, according to reports
- One following another into accident and emergency
- One behind the other in metropolitan demonstration
- One after another in accident and emergency
- Two-seater Manhattan Democrat uses
- Meant for a spin with Daisy initially on board? It was
- One behind the other in Accident & Emergency
- Settled up and collected bike
- Where more than one rider is seen in A & E
- Met climbing vehicle?
Buddy explains!

The straight part
We know that "bike" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bike = tandem.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 TANDEM mean?
TANDEM noun- A carriage pulled by two or more draught animals (generally draught horses) harnessed one behind the other, both providing the pulling power but only the animal in front able to steer.
- (transferred sense) A bicycle or tricycle in which two people sit one behind the other, both able to pedal but only the person in front able to steer.
- A group of two or more people, machines etc. working together; close collaboration.
- Together; working as one.
- One behind the other.