Reproduction of Stonehenge repositioned in capital (15)
I believe the answer is:
parthenogenesis
'reproduction' is the definition.
(parthenogenesis is a kind of reproduction)
'stonehenge repositioned in capital' is the wordplay.
'repositioned' indicates anagramming the letters.
'in' means one lot of letters goes inside another.
'capital' becomes 'paris' (Paris is an example**).
'stonehenge' is an anagram of 'thenogenes'.
'thenogenes' placed inside 'paris' is 'PARTHENOGENESIS'.
'of' acts as a link.
(Other definitions for parthenogenesis that I've seen before include "Way of making young" , "Means to reproduce" , "virgin birth" .)