French premier takes measures using this information (5)
I believe the answer is:
facts
'this information' is the definition.
(I've seen this before)
'french premier takes measures' is the wordplay.
'premier' says to take the initial letters.
'takes' means one lot of letters go next to another.
'measures' becomes 'acts' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The first letter of 'french' is 'f'.
'f'+'acts'='FACTS'
'using' acts as a link.
Can you help me to learn more?
(Other definitions for facts that I've seen before include "Data" , "Realities and certainties" , "these cannot be disputed" , "Certainties, verities" , "Dope" .)