Pearl: article buried in garden plot? (4)
I believe the answer is:
bead
'pearl' is the definition.
(I know that pearl can be written as bead)
'article buried in garden plot?' is the wordplay.
'article' becomes 'a' (the indefinite article in English).
'buried in' means one lot of letters goes inside another (inserted letters get buried).
'garden plot?' becomes 'bed' (I've seen this in another clue).
'a' placed into 'bed' is 'BEAD'.
(Other definitions for bead that I've seen before include "Bauble" , "Small ornamental strung ball" , "Necklace piece; droplet" , "Element of rosary" , "Small drop of moisture" .)