Crowd ended exercise (5-2)
I believe the answer is:
press-up
'exercise' is the definition.
(I know that press-up is a type of arm exercise)
'crowd ended' is the wordplay.
'crowd' becomes 'press' (to press can mean to crowd around).
'ended' becomes 'up' (I can't explain this - if you can you should give a lot more credence to this answer).
'press'+'up'='PRESS-UP'
Can you help me to learn more?
(Other definitions for press-up that I've seen before include "Keep-fit exercise" , "Face-to-the-floor exercise" , "Arm exercise while lying face down" , "Gymnastic floor exercise" , "Form of arm exercise" .)