In Yorkshire river and lake one sees bird (5)
I believe the answer is:
ousel
'bird' is the definition.
(ousel is a kind of bird)
'in yorkshire river and lake' is the wordplay.
'in yorkshire river' becomes 'ouse' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'and' says to put letters next to each other.
'lake' becomes 'L' (geographical abbreviation).
'ouse'+'l'='OUSEL'
'one sees' acts as a link.
Can you help me to learn more?
(Other definitions for ousel that I've seen before include "Old name for a blackbird; also a kind of thrush" , "Strange louse for a blackbird" , "Flyer" , "The bird like a blackbird from Seoul" , "Louse turned out to be a thrush (5)." .)