Cleaner quietly rowed about TV series first (4,6)

'cleaner' is the definition.
(soap powder is a kind of cleaner)

'quietly rowed about tv series first' is the wordplay.
'quietly' becomes 'p' (musical symbol).
'about' is an anagram indicator.
'tv series' becomes 'soap' (soap opera is a type of TV series).
'first' means one lot of letters go next to another.
'rowed' with letters rearranged gives 'owder'.
'p'+'owder'='powder'
'powder' after 'soap' is 'SOAP POWDER'.