Bird found in English river and lake (5)
I believe the answer is:
ousel
'bird' is the definition.
(ousel is a kind of bird)
'english river and lake' is the wordplay.
'english river' becomes 'ouse' (I've seen this in another clue).
'and' means one lot of letters go next to another.
'lake' becomes 'L' (geographical abbreviation).
'ouse'+'l'='OUSEL'
'found in' acts as a link.
(Other definitions for ousel that I've seen before include "Singer" , "Archaic name for blackbird" , "Common black thrush" , "Type of thrush" , "Songbird inhabiting fast-flowing streams" .)