The first group of women rest, running from tornado (7)
I believe the answer is:
twister
'tornado' is the definition.
(I know that tornado can be written as twister)
'the first group of women rest running' is the wordplay.
'the first' becomes 't' (1st letter of 'the').
'group of women' becomes 'WI' (Women's Institute).
'running' indicates an anagram.
'rest' is an anagram of 'ster'.
't'+'wi'+'ster'='TWISTER'
'from' acts as a link.
(Other definitions for twister that I've seen before include "Swindler; tornado (US)" , "Cheat - tornado" , "One dancing" , "Funnel-shaped wind" , "Rogue - tornado" .)