Stole letters from Walsh, cunningly (5)
I believe the answer is:
shawl
'stole' is the definition.
(I've seen this before)
'walsh cunningly' is the wordplay.
'cunningly' indicates anagramming the letters (a cunning or tricky form of the letters).
'walsh' anagrammed gives 'SHAWL'.
'letters from' acts as a link.
(Other definitions for shawl that I've seen before include "Woman assumes this" , "Cloak, wrap" , "Neck warmer" , "mantle" , "Female garment" .)