Magnifying glass? Ring for delivery (5)
I believe the answer is:
loupe
'magnifying glass?' is the definition.
(I've seen this in another clue)
'ring for delivery' is the wordplay.
I cannot really understand how this works, but
'ring' could be 'o' (letter resembling a ring) and 'o' is found in the answer.
The remaining letters 'lupe' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for loupe that I've seen before include "Jeweller's eyepiece" , "Jeweller's magnifying glass" , "instrument in view of fine work" , "Jeweller's eyeglass" .)