Tinkers rashly with something difficult (7)
I believe the answer is:
stinker
'something difficult' is the definition.
I can't tell whether this defines the answer.
'tinkers rashly' is the wordplay.
'rashly' is an anagram indicator.
'tinkers' with letters rearranged gives 'STINKER'.
'with' is the link.
Can you help me to learn more?
(Other definitions for stinker that I've seen before include "Unpleasant person - difficult task" , "Difficult problem" , "Terrible job" , "Very hard task" , "no easy thing" .)