Bird comes to sticky end in channel (5)
I believe the answer is:
gully
'channel' is the definition.
(gully is a kind of channel)
'bird comes to sticky end' is the wordplay.
'bird' becomes 'gull' (gull is a kind of bird).
'comes to' means one lot of letters go next to another.
'sticky end' becomes 'y' (I can't explain this - if you can you should give a lot more credence to this answer).
'gull'+'y'='GULLY'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for gully that I've seen before include "Rainwater channel" , "In field, position" , "Ravine cut by running water" , "Water-course" , "Cricket position; ravine" .)