Stopped without second-class stretcher (4-3)

'stretcher' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?

'stopped without second-class' is the wordplay.
'stopped' becomes 'camped' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'without' is an insertion indicator ('without' can be similar in meaning to 'outside').
'second class' becomes 'b'.
'camped' placed around 'b' is 'CAMP-BED'.

Can you help me to learn more?