Yell about terrible tune for quite a long time (7)
I believe the answer is:
century
'long time' is the definition.
(I've seen this in another clue)
'yell about terrible tune' is the wordplay.
'yell' becomes 'cry' (synonyms).
'about' is an insertion indicator.
'terrible' is an anagram indicator.
'tune' is an anagram of 'entu'.
'cry' placed around 'entu' is 'CENTURY'.
'for quite a' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for century that I've seen before include "A lot of runs!" , "lot of time" , "Period of time" , "Group of a hundred" , "One hundred years" .)