They hold cold lanterns (6)
I believe the answer is:
clamps
'lanterns' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'they hold cold' is the wordplay.
I cannot really see how this works, but
'cold' could be 'c' (eg on taps) and 'c' is found within the answer.
The remaining letters 'lamps' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for clamps that I've seen before include "Devices to hold things, car wheels say" , "fasteners" , "Grips" , "Device to hold things, car wheels say" , "Devices to hold things firmly, car-wheels say" .)