Strive to get variety (6)
I believe the answer is:
strain
This clue is a double definition.
'strive' is the first definition.
(I've seen this before)
'variety' is the second definition.
('strain' can be a synonym of 'variety')
'to get' acts as a link.
(Other definitions for strain that I've seen before include "making a great demand on the emotions?" , "Filter - intense effort" , "Tension - stock" , "Great effort - sieve" , "Trains under stress and pressure" .)