Tending to stick to a dive he has entered (8)
I believe the answer is:
adhesive
'tending to stick' is the definition.
(I've seen this before)
'a dive he has entered' is the wordplay.
'he has' becomes 'hes' (he's).
'entered' indicates putting letters inside.
'dive' enclosing 'hes' is 'dhesive'.
'a'+'dhesive'='ADHESIVE'
'to' acts as a link.
(Other definitions for adhesive that I've seen before include "Substance that sticks" , "What a sticker" , "Tending to stick" , "Sticky; glue" , "Binding" .)