Scattered boxes close to store (6)
I believe the answer is:
sparse
'scattered' is the definition.
(thesaurus)
'boxes close to store' is the wordplay.
'boxes' becomes 'spars' (sparring is a kind of boxing).
'close to' indicates one should take the final letters (the close/ending of).
The last letter of 'store' is 'e'.
'spars'+'e'='SPARSE'
(Other definitions for sparse that I've seen before include "Thin on the ground, scarce" , "Far from lavish" , "rarely occurring" , "not packed together" , "Thinly dotted about" .)