Way wet weather produces stress (6)
I believe the answer is:
strain
'stress' is the definition.
(I know that stress can be written as strain)
'way wet weather' is the wordplay.
'way' becomes 'st' (abbreviation for street).
'wet weather' becomes 'rain' (rain is wet weather).
'st'+'rain'='STRAIN'
'produces' is the link.
(Other definitions for strain that I've seen before include "'Stress, tension (6)'" , "Great effort - sieve" , "particular style of writing" , "Melody; filter" , "Exert oneself to the utmost" .)