Authorise games and bring one's foot down (6,5)
I believe the answer is:
rubber stamp
'authorise' is the definition.
(thesaurus)
'games and bring one's foot down' is the wordplay.
'games' becomes 'rubber' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'and' means one lot of letters go next to another.
'bring one's foot down' becomes 'stamp' (I've seen this before).
'rubber'+'stamp'='RUBBER-STAMP'
Can you help me to learn more?
(Other definitions for rubber stamp that I've seen before include "Approve on the nod" , "Approve without exercising judgment" , "Approve automatically" , "giving endorsement!" , "Automatic approval" .)