Usually humid without right current (7)
I believe the answer is:
topical
'current' is the definition.
(similar in meaning)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for topical that I've seen before include "Like The Sunday Times" , "Applied externally" , "Relating to current affairs" , "Of interest at the present time" , "Current - local - up-to-date" .)