Rarely (6)

I believe the answer is:
seldom
'rarely' is the definition.
(I know that rarely can be written as seldom)
This is the entire clue.
(Other definitions for seldom that I've seen before include "Once in a blue moon" , "Infrequent" , "Not very often, rarely" , "Not often, infrequently" , "Alluvium" .)