Undertook, though enraged, to mend the hole in (6,2)

'undertook' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'enraged to mend the hole in' is the wordplay.
I cannot quite see how this works, but
'hole' could be 'o' and 'o' is found in the answer.
an anagram of 'enraged' is 'agreedn' which is present in the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...

'though' is the link.

Can you help me to learn more?