Fellow parachutists? They are used to strain (9)
I believe the answer is:
colanders
'used to strain' is the definition.
I can't judge whether this defines the answer.
'fellow parachutists? they' is the wordplay.
'fellow' becomes 'co' (eg a co-worker is a fellow worker).
'parachutists? they' becomes 'landers' (I am not sure about this - if you are sure you should believe this answer much more).
'co'+'landers'='COLANDERS'
'are' is the link.
Can you help me to learn more?
(Other definitions for colanders that I've seen before include "they'll be in the kitchen" , "Bowl-shaped strainers" , "Culinary strainers" , "Can solder manufacture perforated utensils?" .)