### Clue: Finish off religious building that is initially not thought suitable (10)
### Answer: CONVENIENT 
 ### Explanation: Definition: suitable
 CONVENT(a religious buiding) **minus its last letter**(Finish off …) + IE(abbrev. for the Latin "id est";that is) + **1st letters, respectively, of**(initially) "not thought".
Defn: Fitting in well with one's needs, activities and plans, as in "a time suitable for you".