Pray for reform, having too much to send up (6)
I believe the answer is:
parody
'send up' is the definition.
(I've seen this in another clue)
'pray for reform having too much' is the wordplay.
'for reform' is an anagram indicator (I've seen this in other clues).
'having' means one lot of letters goes inside another.
'too much' becomes 'od' (abbreviation for overdose).
'pray' anagrammed gives 'pary'.
'pary' placed around 'od' is 'PARODY'.
'to' is the link.
(Other definitions for parody that I've seen before include "Humorous misrepresentation" , "Travesty" , "Exaggerated imitation of a particular genre" , "Skit" , "a lampoon or comic imitation" .)