Space article coming in to strike America (6)
I believe the answer is:
hiatus
'space' is the definition.
(thesaurus)
'article coming in to strike america' is the wordplay.
'article' becomes 'a' (indefinite article).
'coming in to' is an insertion indicator.
'strike' becomes 'hit' ('hit' can be a synonym of 'strike').
'america' becomes 'us' (abbreviation for the United States).
'a' going into 'hit' is 'hiat'.
'hiat'+'us'='HIATUS'
(Other definitions for hiatus that I've seen before include "Disruption" , "A gap or pause in the middle" , "A break or gap in series or sequence" , "Brief respite" , "A gap or lacuna" .)