Feline on a search in cave (8)
I believe the answer is:
catacomb
'cave' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'feline on a search' is the wordplay.
'feline' becomes 'cat' (cat is a kind of feline).
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'search' becomes 'comb' (combing is a kind of searching).
'cat'+'a'+'comb'='CATACOMB'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for catacomb that I've seen before include "Burial-place" , "Underground tunnel for bodies" , "set of tunnels" , "Underground burial chamber" , "crypt" .)