Transport needs to be brought over to be included in fiesta, obviously (4)
I believe the answer is:
boat
'transport' is the definition.
(boat is a kind of transport)
'to be brought over to be included in fiesta obviously' is the wordplay.
'to be brought over' is a reversal indicator.
'to be included in' says the answer is hidden in the clue.
'taob' is hidden in the letters of 'fiesta obviously'.
'taob' in reverse letter order is 'BOAT'.
'needs' is the link.
(Other definitions for boat that I've seen before include "Contest on the Thames" , "Water transport" , "Vessel for travelling on water" , "Floating vessel" , "Vehicle for travelling over water" .)