Deliberately set fire to church at base of rocky height (5)
I believe the answer is:
torch
'deliberately set fire' is the definition.
'to church at base of rocky height' is the wordplay.
'church' becomes 'c' (this could be a standard abbreviation I've not previously seen).
'at' is a charade indicator (letters next to each other) (I've seen this in other clues).
'base of' says to take the initial letters.
'height' becomes 'h'.
The first letter of 'rocky' is 'r'.
'c' after 'r' is 'rc'.
'to'+'rc'+'h'='TORCH'
Can you help me to learn more?
(Other definitions for torch that I've seen before include "Source of light" , "Small hand-held battery lamp" , "Small portable battery-powered electric lamp" , "Set fire to (something)" , "Such a love song" .)