With it around about, regularly all over the shop (7)
I believe the answer is:
chaotic
'all over the shop' is the definition.
(all over the shop can informally mean disordered)
'with it around about regularly' is the wordplay.
'with it' becomes 'chic' (both can mean fashionable).
'around' indicates putting letters inside.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
The alternating letters of 'about' are 'aot'.
'chic' enclosing 'aot' is 'CHAOTIC'.
(Other definitions for chaotic that I've seen before include "In utter confusion" , "All over the place" , "mess" , "In complete disorder" , "badly arranged" .)