Every American satellite passing over Pole, it’s implied (8)
I believe the answer is:
allusion
'it's implied' is the definition.
(an allusion is something implied or hinted at)
'every american satellite passing over pole' is the wordplay.
'every' becomes 'all' (similar in meaning).
'american' becomes 'us' (abbreviation for United States).
'satellite' becomes 'io' (Io is a moon of Jupiter).
'passing over' is a charade indicator (letters next to each other).
'pole' becomes 'n' (abbreviation for North, as in North Pole).
'all'+'us'+'io'+'n'='ALLUSION'
(Other definitions for allusion that I've seen before include "A brief or indirect reference to something" , "Subtle reference" , "Passing reference or indirect mention" .)