Large water bird that is seen in the sky (3,6)
I believe the answer is:
big dipper
'is seen in the sky' is the definition.
I can't tell whether this defines the answer.
'large water bird' is the wordplay.
'large' becomes 'big' (synonyms).
'water bird' becomes 'dipper' (dipper is a kind of water bird).
'big'+'dipper'='BIG DIPPER'
'that' is the link.
Can you help me to learn more?
(Other definitions for big dipper that I've seen before include "Stars in America" , "Roller coaster - The Plough (in the US)" , "rollercoaster" , "Fairground ride" , "switchback" .)