Thug wanting bit of attention admitting twisting Trump's slogan, wretched child (10)
I believe the answer is:
ragamuffin
'wretched child' is the definition.
(term for a wretched or poor child)
I don't understand the rest of the clue.
(Other definitions for ragamuffin that I've seen before include "Disreputable type" , "Scruffy urchin" , "Waif" , "One got up badly" , "Scruffy little fellow" .)