Covering church fellows provided with time for memorial slab (9)
I believe the answer is:
hatchment
'memorial slab' is the definition.
(type of memorial plaque)
'covering church fellows provided with time' is the wordplay.
'covering' becomes 'hat' (hat is a kind of covering).
'church' becomes 'ch' (common abbreviation).
'fellows' becomes 'men' (I've seen this before).
'provided with' says to put letters next to each other.
'time' becomes 't' (abbreviation).
'hat'+'ch'+'men'+'t'='HATCHMENT'
'for' acts as a link.
(Other definitions for hatchment that I've seen before include "Diamond-shaped coat of arms" , "chicks" .)