Thrifty shopper unearthing bra, pants (7,6)
I believe the answer is:
bargain hunter
'thrifty shopper' is the definition.
'bargain hunter' can be an answer for 'shopper' (I have seen 'Canny shopper' mean 'bargain hunter' so perhaps 'shopper' could also mean 'bargain hunter'). I am not sure about the 'thrifty' bit.
'unearthing bra pants' is the wordplay.
'pants' is an anagram indicator (UK informal term for 'nonsense' or 'rubbish').
'unearthing'+'bra'='unearthingbra'
'unearthingbra' with letters rearranged gives 'BARGAIN-HUNTER'.
Can you help me to learn more?
(Other definitions for bargain hunter that I've seen before include "Person attending the January sales, perhaps" , "One looking for a snip" , "One looking for cheap deals" , "Canny shopper" .)