Iberian country saving one bridge (4)
I believe the answer is:
span
'bridge' is the definition.
(I know that bridge can be written as span)
'iberian country saving one' is the wordplay.
'iberian country' becomes 'spain' (country on the Iberian Peninsula).
'saving' indicates named letters should be taken away (saving can mean except).
'one' becomes 'i' (Roman numeral).
'spain' with 'i' taken away is 'SPAN'.
(Other definitions for span that I've seen before include "Bridge made of pans" , "Extent - 9 inches" , "Extent of 20" , "Length of bridge - 9 inches!" , "Distance or interval between two points" .)