Fights to get one's feet wet? (5,2)

'wet?' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'fights to get one's feet' is the wordplay.
'fights' becomes 'wadein' (I can't justify this - if you can you should give a lot more credence to this answer).
'to get' indicates putting letters inside.
'feet' indicates one should take the final letters (I've seen 'foot' mean this (in a down clue, the bottom letter)).
The final letter of 'ones' is 's'.
'wadein' placed around 's' is 'WADES IN'.

Can you help me to learn more?