Cruel and senseless to inhibit what bees do (8)
I believe the answer is:
inhumane
'cruel' is the definition.
('inhumane' can be similar in meaning to 'cruel')
'senseless to inhibit what bees do' is the wordplay.
'senseless' becomes 'inane' (I've seen this before).
'to inhibit' means one lot of letters goes inside another.
'what bees do' becomes 'hum'.
'inane' enclosing 'hum' is 'INHUMANE'.
'and' acts as a link.
(Other definitions for inhumane that I've seen before include "Not compassionate" , "Callous" , "Cruel" , "Heartless" .)