Does the crossword and gets all the solutions (5,2,3)

'the solutions' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'does the crossword and gets all' is the wordplay.
'does the crossword' becomes 'i' (I can't explain this - if you can you should give a lot more credence to this answer).
'and' says to put letters next to each other (I've seen this in other clues).
'gets' becomes 'works' ('work' can be a synonym of 'get').
'all' becomes 'tout' (I've seen this before).
'i' put after 'works' is 'worksi'.
'worksi'+'tout'='WORKS IT OUT'

Can you help me to learn more?