Mother's accompanying the Spanish lass (6)
I believe the answer is:
damsel
'lass' is the definition.
(I've seen this in another clue)
'mother's accompanying the spanish' is the wordplay.
'mother's' becomes 'dam's' (female parent of an animal).
'accompanying' says to put letters next to each other.
'the spanish' becomes 'el' ('the' in Spanish).
'dams'+'el'='DAMSEL'
(Other definitions for damsel that I've seen before include "distressed girl?" , "(Poetically) a young unmarried woman" , "little fly" , "Girl (literary)" , "Maiden (poetic)" .)