Squint, as overbearing editor receives tip from Eccles (4-4)
I believe the answer is:
boss-eyed
'squint' is the definition.
(both can mean having a squint)
'overbearing editor receives tip from eccles' is the wordplay.
'overbearing' becomes 'bossy'.
'editor' becomes 'ed'.
'receives' indicates putting letters inside.
'tip from' says to take the initial letters.
The first letter of 'eccles' is 'e'.
'bossy'+'ed'='bossyed'
'bossyed' placed around 'e' is 'BOSS-EYED'.
'as' is the link.
(Other definitions for boss-eyed that I've seen before include "With a squint" , "Looking two ways!" , "Squinting" , "Out of true" .)