Linger and look into Ebro, oddly (6)
I believe the answer is:
loiter
'linger' is the definition.
(synonyms)
'look into ebro oddly' is the wordplay.
'look' becomes 'lo'.
'oddly' indicates alternate letters (letters in the odd-numbered positions are used).
'into'+'ebro'='intoebro'
The alternating letters of 'intoebro' are 'iter'.
'lo'+'iter'='LOITER'
'and' acts as a link.
(Other definitions for loiter that I've seen before include "Linger aimlessly" , "Stand around aimlessly" , "Dawdle, hang around" , "lounge" , "Linger - lurk" .)