Traipses around externally impressive food shop (10)
I believe the answer is:
patisserie
'food shop' is the definition.
(I've seen this before)
'traipses around externally impressive' is the wordplay.
'around' indicates anagramming the letters.
'externally' says to hollow out the word (remove centre letters) (only the external letters are used).
'impressive' with its middle removed is 'ie'.
'traipses' with letters rearranged gives 'patisser'.
'patisser'+'ie'='PATISSERIE'
(Other definitions for patisserie that I've seen before include "supplier of tarts" , "food shop" , "store for Brownies?" , "where cakes are sold" , "eclairs and the like" .)