Being stretched, no longer nursed (8)
I believe the answer is:
extended
'being stretched' is the definition.
(I've seen this before)
'no longer nursed' is the wordplay.
'no longer' becomes 'ex' (prefix meaning former or onetime).
'nursed' becomes 'tended' (I've seen this before).
'ex'+'tended'='EXTENDED'
(Other definitions for extended that I've seen before include "Stretched, drew out" , "Widened" , "Made longer" , "Stretched out over time or space" , "Elongated, expanded" .)