Both sexes love to get stuck into rising amount of work? That’s stupid (7)
I believe the answer is:
damfool
'both sexes love to get stuck' is the definition.
I can't tell whether this definition defines the answer.
'rising amount of work? that's stupid' is the wordplay.
'rising' shows that the letters should be reversed in order (going up in a down clue).
'amount of work?' becomes 'mad' (I can't explain this - if you can you should believe this answer much more).
'that's stupid' becomes 'fool' (similar in meaning).
'mad' reversed gives 'dam'.
'dam'+'fool'='DAMFOOL'
'into' acts as a link.
Can you help me to learn more?
(Another definition for damfool that I've seen is " It's very stupid".)