Scrap very loud sex when retired (4)
I believe the answer is:
tiff
'scrap' is the definition.
(thesaurus)
'very loud sex when retired' is the wordplay.
'very loud' becomes 'ff' (musical abbreviation).
'sex when' becomes 'it' (a common euphemism. I am not sure about the 'when' bit.).
'retired' shows that the letters should be reversed in order.
'ff'+'it'='ffit'
'ffit' written backwards gives 'TIFF'.
Can you help me to learn more?
(Other definitions for tiff that I've seen before include "A minor quarrel of disagreement" , "Lovers' row" , "causing quarrel" , "Minor squabble" , "(Lovers') quarrel" .)