Constellation version omitted in changes (5)
I believe the answer is:
aries
'constellation' is the definition.
(Aries is an example)
'version omitted in changes' is the wordplay.
'version' becomes 'v' (v1, v2 etc).
'omitted in' indicates named letters should be taken away.
'changes' becomes 'varies' ('vary' can be a synonym of 'change').
'varies' with 'v' taken out is 'ARIES'.
(Other definitions for aries that I've seen before include "Stars" , "Zodiacal sign also known as the Ram" , "Constellation with sign of the ram" , "Philip -, English poet" , "Sheep" .)