Rubber giving faultless service for years (6)
I believe the answer is:
'rubber' is the definition.
(I've seen this before)
'faultless service for years' is the wordplay.
'faultless service' becomes 'ser' (I am not sure about this - if you are sure you should believe this answer much more).
'for' says to put letters next to each other (I've seen this in other clues).
'years' becomes 'era' (I've seen this before).
'ser' put after 'era' is 'ERASER'.
'giving' is the link.
Can you help me to learn more?
(Other definitions for eraser that I've seen before include "Required, should you make a mistake" , "Rubbing-out device" , "Piece of rubber for deleting pencil marks" , "Obliterator" , "(Pencil, ink) rubber" .)