Eg, sandpiper (5)
I believe the answer is:
wader
'eg sandpiper' is the definition.
(sandpiper is a kind of wader)
This is the entire clue.
(Other definitions for wader that I've seen before include "Long-legged shore bird" , "Long waterproof boot" , "Bird such as a sandpiper or plover" , "Heron, say" , "High waterproof boot" .)