Insect going wrong way was first to get snarled (7)
I believe the answer is:
tangled
'snarled' is the definition.
('tangle' can be a synonym of 'snarl')
'insect going wrong way was first' is the wordplay.
'insect' becomes 'gnat' (gnat is a kind of insect).
'going wrong way' shows that the letters should be reversed in order.
'was first' becomes 'led'.
'gnat' written backwards gives 'tang'.
'tang'+'led'='TANGLED'
'to get' is the link.
(Other definitions for tangled that I've seen before include "Confusedly twisted" , "D [Disney] made" , "Convoluted" , "All twisted together" , "Confusedly matted" .)