Intensify stock cube using chicken (8)
I believe the answer is:
heighten
'intensify' is the definition.
(heightening is a kind of intensifying)
'stock cube using chicken' is the wordplay.
I cannot really see how this works, but
'cube' could be 'eight' (8 is a cube number) and 'eight' is found in the answer.
'chicken' could be 'hen' (hen is a kind of chicken) and 'hen' is present in the leftover letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for heighten that I've seen before include "Raise" , "effect some improvement" , "Make more intense - elevate?" , "Make more intense, say awareness" , "Intensify; make taller" .)