Quietly again the cat returns for a physical exercise (5-2)
I believe the answer is:
press-up
'physical exercise' is the definition.
'press up' can be an answer for 'exercise' (I've seen this before). I am unsure of the 'physical' bit.
'quietly again the cat returns' is the wordplay.
'quietly' becomes 'p' (p for piano and quiet).
'again' becomes 're' (prefix meaning 'again').
'the cat' becomes 'puss' (puss is a kind of cat).
'returns' shows that the letters should be reversed in order.
'puss' backwards is 'ssup'.
'p'+'re'+'ssup'='PRESS-UP'
'for a' is the link.
Can you help me to learn more?
(Other definitions for press-up that I've seen before include "Gymnastic floor exercise" , "Form of arm exercise" , "PE exercise" , "Face-to-the-floor exercise" , "Keep-fit exercise" .)