Room to see a bit of telly? (4)
I believe the answer is:
cell
'room' is the definition.
(cell is a kind of room)
'see a bit of telly?' is the wordplay.
'see' becomes 'C' (the word for the letter, according to Chambers).
'a bit of telly?' becomes 'ell' (I can't explain this - if you can you should believe this answer much more).
'c'+'ell'='CELL'
'to' is the link.
Can you help me to learn more?
(Other definitions for cell that I've seen before include "Small compartment" , "Unit of animal or plant structure" , "required for current generation?" , "Animal or plant building unit" , "Small room for nun, monk or prisoner" .)