Current putting Hamlet right off (7)
I believe the answer is:
thermal
'current' is the definition.
(I've seen this before)
'hamlet right off' is the wordplay.
'right' becomes 'r' (common abbreviation).
'off' indicates anagramming the letters.
'hamlet'+'r'='hamletr'
'hamletr' with letters rearranged gives 'THERMAL'.
'putting' is the link.
(Other definitions for thermal that I've seen before include "Rising current of warm air" , "Updraught for gliders" , "type of baths" , "Relating to heat" , "Designed to retain heat" .)