Stonehenge worshipper did without sport (5)
I believe the answer is:
'stonehenge worshipper' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'did without sport' is the wordplay.
'without' means one lot of letters goes inside another ('without' can be similar in meaning to 'outside').
'sport' becomes 'RU' (rugby union).
'did' going around 'ru' is 'DRUID'.
Can you help me to learn more?
(Other definitions for druid that I've seen before include "Old Celtic priest", "old magician?", "Member of Welsh Gorsedd; ancient priest", "Ancient Celtic priest", "Pre-Christian Celtic priest".)