Endeavour to meet religious type for clandestine meeting (5)
I believe the answer is:
tryst
'clandestine meeting' is the definition.
(I've seen this in another clue)
'endeavour to meet religious type' is the wordplay.
'endeavour' becomes 'try' (synonyms).
'to meet religious type' becomes 'st' (I can't explain this - if you can you should give a lot more credence to this answer).
'try'+'st'='TRYST'
'for' is the link.
Can you help me to learn more?
(Other definitions for tryst that I've seen before include "where lovers meet" , "Lump (of gold, etc)" , "private appointment" , "Pre-arranged (secret) meeting" , "private meeting" .)