Made no blunders engaging chief for dot.com, perhaps? (6,4)

'dot com perhaps?' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'made no blunders engaging chief' is the wordplay.
I cannot quite understand how this works, but
'no' could be 'o' (O resembles 0) and 'o' is present in the answer.
'chief' could be 'main' (synonyms) and 'main' is found within the answer.
This may be the basis of the clue (or it may be nonsense).

'for' acts as a link.

Can you help me to learn more?