Work out how to remain acceptable? (4,3)
I believe the answer is:
keep fit
'work out how' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'remain acceptable?' is the wordplay.
'remain' becomes 'keep' (keeping is a kind of remaining).
'acceptable?' becomes 'fit' (similar in meaning).
'keep'+'fit'='KEEP FIT'
'to' is the link.
Can you help me to learn more?
(Other definitions for keep fit that I've seen before include "Callisthenics" , "Exercise designed for physical wellbeing" , "sort of exercise" , "Maintain health" , "Do physical exercises?" .)