Do well with riveting? Not entirely (6)
I believe the answer is:
thrive
'do well' is the definition.
(I've seen this in another clue)
'with riveting? not entirely' is the wordplay.
'not entirely' indicates a hidden word.
'THRIVE' is hidden in the letters of 'with riveting'.
(Other definitions for thrive that I've seen before include "Be successful" , "Succeed" , "Develop well" , "Grow strongly" , "Grow vigorously, flourish" .)