The only luggage that one needs? (7)

I believe the answer is:

holdall

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

'the only luggage' is the definition.
'holdall' can be an answer for 'luggage' (thesaurus). I'm not sure about the 'the only' bit.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for holdall that I've seen before include "Large case, with handles" , "retainer" , "A large soft travelling bag - stuff everything in" , "Handled bag" , "Item of luggage" .)

I've seen this clue in The Irish News and The Globe and Mail.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.