Flower opening in Uruguay? Many gathered round (5)
I believe the answer is:
lotus
'flower' is the definition.
(I know that Lotus is a type of flower)
'opening in uruguay? many gathered round' is the wordplay.
'opening in' says to take the initial letters.
'many' becomes 'lots' (lots of something).
'gathered round' indicates putting letters inside.
The initial letter of 'uruguay' is 'u'.
'u' inserted within 'lots' is 'LOTUS'.
(Other definitions for lotus that I've seen before include "Sacred Egyptian water lily" , "Large water lily" , "Mythological fruit - lily" , "the indolent took for eating" , "Sacred symbol" .)