It's highly exposed during a storm (3)
I believe the answer is:
tor
'it's highly exposed' is the definition.
I can't judge whether this definition defines the answer.
'during a storm' is the wordplay.
'during' indicates a hidden word.
'TOR' can be found hidden inside 'storm'.
Can you help me to learn more?
(Other definitions for tor that I've seen before include "Rot on rocky peak" , "Feature of Dartmoor" , "Rocky outcrop" , "Rocky height, eg Mam" , "A rocky hill in Devon" .)