Pentecost week ran into Sabbath? (7)
I believe the answer is:
whitsun
'pentecost' is the definition.
(I've seen this before)
'week ran into sabbath?' is the wordplay.
'week' becomes 'w' (abbreviation).
'ran into' becomes 'hit' (eg ran into with a vehicle).
'sabbath?' becomes 'sun' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'w'+'hit'+'sun'='WHITSUN'
Can you help me to learn more?
(Other definitions for whitsun that I've seen before include "Period seven weeks after Easter" , "Holy Spirit festival" , "Spring festival" , "Wins hut on short Christian Sabbath" , "Pentecost season" .)