Fish with appendages for walking on (7)

I believe the answer is:

legside

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'walking on' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'fish with appendages' is the wordplay.
'fish' becomes 'ide' (type of fish).
'with' means one lot of letters go next to another.
'appendages' becomes 'legs' (leg is a kind of appendage).
'ide' after 'legs' is 'LEGSIDE'.

'for' acts as a link.

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