Inner desires that can get Reg going in the States (5)
I believe the answer is:
urges
'inner desires' is the definition.
'urges' can be an answer for 'desires'. I'm not sure about the 'inner' bit.
'can get reg going in the states' is the wordplay.
I cannot quite see how this works, but
an anagram of 'reg' is 'rge' which is present in the answer.
'states' could be 'us' (abbreviation for the United States) and 'us' is found in the remaining letters.
No letters remain.
This explanation may well be incorrect...
'that' is the link.
Can you help me to learn more?
(Other definitions for urges that I've seen before include "Strong impulses" , "Eggs on" , "Drives" , "Compulsions" , "Presses to do something" .)