Dog getting the Spanish tag (5)
I believe the answer is:
label
'tag' is the definition.
(I know that label is a action)
'dog getting the spanish' is the wordplay.
'dog' becomes 'lab' (short for labrador).
'getting' says to put letters next to each other.
'the spanish' becomes 'el' ('the' in Spanish).
'lab'+'el'='LABEL'
(Other definitions for label that I've seen before include "Identifying tag" , "Tag or designation" , "Mark" , "Identify" , "Tag, tab" .)