Pass through circuits between earths (6)
I believe the answer is:
elapse
'pass' is the definition.
(synonyms)
'circuits between earths' is the wordplay.
'circuits' becomes 'laps' ('lap' can be a synonym of 'circuit').
'between' indicates putting letters inside.
'earths' becomes 'EE' (an abbreviation for Earth written twice).
'laps' inserted within 'ee' is 'ELAPSE'.
'through' acts as a link.
(Other definitions for elapse that I've seen before include "Pass away - asleep (anag)" , "Passing" , "Please (anag) -- pass away" , "Glide by" , "Go past" .)