Current sort of underwear? (7)
I believe the answer is:
thermal
This clue could be a double definition.
'current' is the first definition.
(I've seen this before)
'sort of underwear?' is the second definition.
'thermal' can be an answer for 'underwear?' (I've seen this before). I am not certain of the 'sort of' bit.
Can you help me to learn more?
(Other definitions for thermal that I've seen before include "help for glider" , "type of baths" , "Rising current of warm air" , "which can take a glider up" , "A lot of hot air" .)