Web program beginning to harm two things (4)
I believe the answer is:
both
'web program beginning to harm two things' is the definition.
I can't tell whether this defines the answer.
'web program beginning to harm' is the wordplay.
'web program' becomes 'bot' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'beginning to' suggests taking the first letters.
The initial letter of 'harm' is 'h'.
'bot'+'h'='BOTH'
Can you help me to learn more?
(Other definitions for both that I've seen before include "Each of two (alternatives)" , "couple" , "The one and the other" , "The two (things)" , "Two considered together" .)