Truly bothered about the information, needing to act fast (8)
I believe the answer is:
urgently
'to act fast' is the definition.
I can't judge whether this defines the answer.
'truly bothered about the information' is the wordplay.
'bothered' indicates anagramming the letters.
'about' means one lot of letters goes inside another.
'the information' becomes 'gen' (gen is a kind of information).
'truly' is an anagram of 'urtly'.
'urtly' going around 'gen' is 'URGENTLY'.
'needing' is the link.
Can you help me to learn more?
(Other definitions for urgently that I've seen before include "without delay" , "Pressingly" , "With speedy attention" , "As a matter of priority" , "Immediately, with pressing need" .)