Very slow or very nippy (7)
I believe the answer is:
glacial
This could be a double definition.
'very slow' is the first definition.
(as in a glacial place)
'very nippy' is the second definition.
'glacial' can be an answer for 'nippy' (thesaurus). I am not sure about the 'very' bit.
'or' acts as a link.
Can you help me to learn more?
(Other definitions for glacial that I've seen before include "Ice cold" , "Icy; distant" , "Extremely cold" , "Relating to ice" , "Freezing - unfriendly" .)