Delicate six-footer in league champion side (8)
I believe the answer is:
'delicate six-footer' is the definition.
(delicate insect with six feet)
'league champion side' is the wordplay.
'league' becomes 'l' (abbreviation).
'champion' becomes 'ace' (I've seen this before).
'side' becomes 'wing' (I've seen this in other clues).
'in' is the link.