So you like praying! Hope supplication starts to produce some slender graceful girls? (6)
I believe the answer is:
sylphs
'some slender graceful girls?' is the definition.
(I've seen this in another clue)
'so you like praying hope supplication starts to' is the wordplay.
'starts to' indicates taking the first letters.
The initial letters of 'so you like praying hope supplication' is 'SYLPHS'.
'produce' is the link.
(Other definitions for sylphs that I've seen before include "Slim women" , "Spirits of the air" .)