Unusual action needed to consume cold tongue (7)
I believe the answer is:
occitan
'tongue' is the definition.
(European language)
'unusual action needed to consume cold' is the wordplay.
'unusual' indicates an anagram.
'needed to consume' indicates putting letters inside.
'cold' becomes 'c' (eg on taps).
'action' is an anagram of 'ocitan'.
'ocitan' going around 'c' is 'OCCITAN'.
(Other definitions for occitan that I've seen before include "Southern French dialect" , "tongue" .)