The Tenth Muse has elevated love, penning pages (6)
I believe the answer is:
sappho
'the tenth muse' is the definition.
(I've seen this in another clue)
'has elevated love penning pages' is the wordplay.
'elevated' shows that the letters should be reversed in order (in a down clue, letters go up).
'love' becomes 'o' (love means zero in tennis).
'penning' is an insertion indicator.
'pages' becomes 'pp' (abbreviation for multiple pages).
'has' in reverse letter order is 'sah'.
'sah'+'o'='saho'
'saho' going around 'pp' is 'SAPPHO'.
(Other definitions for sappho that I've seen before include "Ancient Greek poet of Lesbos" , "Pa hops about Greek poet from Lesbos" , "Greek female poet" , "Sixth century BC Greek poetess" , "Pa hops around the ancient Greek poetess" .)