Strange space-time's features? (7)
I believe the answer is:
aspects
'features?' is the definition.
(aspect is a kind of feature)
'strange space-time's' is the wordplay.
'strange' indicates an anagram.
'time's' becomes 't's' (abbreviation).
'space' is an anagram of 'aspec'.
'aspec'+'ts'='ASPECTS'
(Other definitions for aspects that I've seen before include "Looks or appearances" , "Appearances presented by saps etc." , "Views, vistas or facets" , "Elements; views" , "Features (of a problem)" .)