It took place in the Seventies (5)
I believe the answer is:
event
'it took' is the definition.
The definition suggests a singular noun which matches the answer.
'in the seventies' is the wordplay.
'in' says the answer is hidden in the clue.
'EVENT' can be found hidden inside 'seventies'.
'place' acts as a link.
Can you help me to learn more?
(Other definitions for event that I've seen before include "game, perhaps" , "Something that takes place" , "Something that happens - part of a programme?" , "Fixture" , "pole vault maybe" .)