Young winger last to tie end of bootlace (6)
I believe the answer is:
eaglet
'young' is the definition.
(I know that eaglet is a type of young bird)
'tie end of bootlace' is the wordplay.
'end of' indicates one should take the final letters.
'bootlace' becomes 'aglet' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The last letter of 'tie' is 'e'.
'e'+'aglet'='EAGLET'
'winger last to' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for eaglet that I've seen before include "Little bird" , "another of the golden generation?" , "Eyrie resident" , "Fledgling" , "Young keen-sighted bird" .)