Crossword Genius

Additional item, apparently last to be carried by servant (9)

Ross

I believe the answer is:

appendage

I'm a little stuck... Click here to teach me more about this clue!

'additional item' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?

'apparently last to be carried by servant' is the wordplay.
'apparently' becomes 'ap' (I've seen this in other clues).
'last' becomes 'end' (I've seen this in another clue).
'to be carried by' means one lot of letters goes inside another.
'servant' becomes 'page' (I've seen this before).
'end' put inside 'page' is 'pendage'.
'ap'+'pendage'='APPENDAGE'

Can you help me to learn more?

(Other definitions for appendage that I've seen before include "E.g. insect's leg, feeler" , "Something attached to a larger thing" , "Addendum" , "Thing attached to another" , "An outgrowth" .)

I've seen this clue in The Independent.
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