Light meal Athena regularly provides (3)
I believe the answer is:
tea
'light meal' is the definition.
(I've seen this before)
'athena regularly provides' is the wordplay.
'regularly provides' indicates alternate letters.
The alternating letters of 'athena' are 'TEA'.
(Other definitions for tea that I've seen before include "Plant" , "tips for the cup?" , "Light afternoon repast" , "Earl Grey?" , "and 18 Across: Utensils for afternoon meal" .)