Supports individual joining in with these innovators (8)
I believe the answer is:
pioneers
'these innovators' is the definition.
('pioneer' can be a synonym of 'innovator')
'supports individual joining in' is the wordplay.
'supports' becomes 'piers' (pier is a kind of support).
'individual' becomes 'one' (an individual is one person).
'joining in' indicates putting letters inside.
'piers' enclosing 'one' is 'PIONEERS'.
'with' acts as a link.
(Other definitions for pioneers that I've seen before include "Innovators" , "First settlers in a new territory" , "They open up new territories" , "Ground-breakers, trail-blazers" .)