Blotch on spiritual leaders attending PM's residence (7)
I believe the answer is:
splodge
'blotch on spiritual leaders' is the definition.
'splodge' can be an answer for 'blotch' (synonyms). I am not sure about the 'on spiritual leaders' bit.
'attending pm's residence' is the wordplay.
'attending pm' becomes 'sp' (I can't explain this - if you can you should give a lot more credence to this answer).
'residence' becomes 'lodge' (I've seen this before).
'sp'+'lodge'='SPLODGE'
Can you help me to learn more?
(Other definitions for splodge that I've seen before include "big splash" , "Irregular blot" , "Spot, splash, smear" , "Dirty mark" , "Messy spot" .)