Inordinate diatribe about daughter with bare back (9)
I believe the answer is:
redundant
'inordinate' is the definition.
(both can mean unnecessary)
'diatribe about daughter with bare back' is the wordplay.
'diatribe' becomes 'rant' (I've seen this in another clue).
'about' indicates putting letters inside.
'daughter' becomes 'd' (genealogical abbreviation).
'with bare' becomes 'nude' (synonyms. I am not sure about the 'with' bit.).
'back' shows that the letters should be reversed in order.
'd'+'nude'='dnude'
'dnude' back-to-front is 'edund'.
'rant' placed around 'edund' is 'REDUNDANT'.
Can you help me to learn more?
(Other definitions for redundant that I've seen before include "excessive?" , "unwanted" , "getting P45?" , "No longer necessary" , "no longer wanted" .)