Fellows back in area — remote, rocky — getting measure of wind (10)
I believe the answer is:
anemometer
'measure of wind' is the definition.
(an anemometer measures wind speed)
'fellows back in area remote rocky' is the wordplay.
'fellows' becomes 'men' (fellow can mean a man).
'back' shows that the letters should be reversed in order.
'in' is an insertion indicator.
'area' becomes 'a' (maths abbreviation).
'rocky' indicates an anagram (letters rocked or thrown around).
'men' backwards is 'nem'.
'remote' anagrammed gives 'ometer'.
'a'+'ometer'='aometer'
'nem' going into 'aometer' is 'ANEMOMETER'.
'getting' is the link.
(Other definitions for anemometer that I've seen before include "Wind speed measurer" , "Wind speed instrument" , "Air Force display unit?" , "Wind speed gauge" , "Windspeed measurer" .)