Well known for having sporadically done time in (5)
I believe the answer is:
noted
'well known' is the definition.
(I've seen this before)
'having sporadically done time in' is the wordplay.
I cannot quite understand how this works, but
'time' could be 't' (abbreviation) and 't' is found in the answer.
an anagram of 'done' is 'noed' which is present in the left over letters.
No letters remain.
This explanation may well be incorrect...
'for' is the link.
Can you help me to learn more?
(Other definitions for noted that I've seen before include "Significant" , "Observed or took account of" , "Widely known and esteemed" , "Renowned" , "Like music" .)