Tons wander around store with valuables (5)
I believe the answer is:
trove
'store with valuables' is the definition.
(as in a treasure trove)
'tons wander' is the wordplay.
'tons' becomes 't'.
'wander' becomes 'rove' ('rove' can be a synonym of 'wander').
't'+'rove'='TROVE'
'around' acts as a link.
(Other definitions for trove that I've seen before include "Store of valuable things" , "Pirates' treasure?" , "Overt sort of hidden treasure" , "Cache of treasure for voter" , "Voter (anag.)" .)