Content to renew spa personnel daily? (9)
I believe the answer is:
newspaper
'daily?' is the definition.
(daily is a kind of newspaper)
'content to renew spa personnel' is the wordplay.
'content to' says the answer is hidden in the clue.
'NEWSPAPER' is hidden in the letters of 'renew spa personnel'.
(Other definitions for newspaper that I've seen before include "Broadsheet, e.g." , "part of the media" , "It's (mainly) black and white, and read all over!" , "Journal" , "Daily or weekly publication, keeps us abreast" .)