A prayer made in moonwalk, maybe over lunar seas (3,5)
I believe the answer is:
ave maria
'a prayer' is the definition.
(Ave Maria is an example)
'moonwalk maybe over lunar seas' is the wordplay.
'moonwalk maybe' becomes 'ave' (I can't justify this - if you can you should give a lot more credence to this answer).
'over' says to put letters next to each other (in a down clue, some letters go over others).
'lunar seas' becomes 'maria' (I've seen this in another clue).
'ave'+'maria'='AVE MARIA'
'made in' is the link.
Can you help me to learn more?
(Other definitions for ave maria that I've seen before include "Hail Mary, in Latin" , "Prayer to the Virgin Mary" , "Catholic prayer" , "Work of Schubert" , "Hail Mary (Lat.)" .)