What does the cryptic crossword clue "Plain guy struggles building a store (6,2)" mean?

The definition is "store". The wordplay uses an anagram. anagram of PLAIN + GUY = LAYINGUP; definition: "store" The answer is LAYINGUP.

Plain guy struggles building a store (6,2)

Guardian Cryptic #29351 | 29 Across | 2024-04-08 flower