Try case of larceny hesitantly (5)
I believe the answer is:
shyly
'hesitantly' is the definition.
'try case of larceny' is the wordplay.
'try' becomes 'shy' (as in the phrase 'have a shy at').
'case of' says to hollow out the word (remove centre letters) (outsides of).
'larceny' with its middle taken out is 'ly'.
'shy'+'ly'='SHYLY'
(Other definitions for shyly that I've seen before include "In reserved way" , "Nervously, timidly" , "In a timid manner" .)