Writer’s one book covered in a lot of rubble (6)
I believe the answer is:
scribe
'writer's' is the definition.
(scribe is a kind of writer)
'covered in a lot of rubble' is the wordplay.
'covered' becomes 'ib' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in' indicates putting letters inside.
'a lot of' means to remove the last letter (a lot of but not all of the word).
'rubble' becomes 'scree' (I've seen this in another clue).
'scree' with its last letter removed is 'scre'.
'ib' going within 'scre' is 'SCRIBE'.
'one book' is the 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 scribe that I've seen before include "A person writing" , "Official writer" , "Professional writer" , "Write" , "Mark with a sharp point" .)