A bird traversing lake, a noted flyer (6)
I believe the answer is:
alcock
'a noted flyer' is the definition.
'alcock' can be an answer for 'flyer' (I've seen this before). I'm not sure about the 'a noted' bit.
'a bird traversing lake' is the wordplay.
'bird' becomes 'cock' (cock is a kind of bird).
'traversing' is an insertion indicator.
'lake' becomes 'L' (geographical abbreviation).
'a'+'cock'='acock'
'acock' going around 'l' is 'ALCOCK'.
Can you help me to learn more?
(Other definitions for alcock that I've seen before include "one first crossed pond" , "Aviator with 7 [BROWN]" , "British aviator who flew Atlantic with Brown" , "Flyer" , "Early aviator" .)