Gather in Panama's Sasardi (5)
I believe the answer is:
amass
'gather' is the definition.
(amass can mean to collect or gather)
'in panama's sasardi' is the wordplay.
'in' says the answer is hidden in the clue.
'AMASS' is hidden within 'panamas sasardi'.
(Other definitions for amass that I've seen before include "Be a compiler" , "Gather together, pile up" , "Build up" , "run up?" , "Stock up on" .)