Like eighteen holes? (5)

I believe the answer is:

round

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This might be a double definition.

'like' is the first definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?

'eighteen holes?' is the second definition.
(a round of golf includes eighteen holes)

Can you help me to learn more?

(Other definitions for round that I've seen before include "Get applause" , "single slice of bread!" , "(Of voice) rich, mellow" , "Spherical; song" , "with 6D [SPARE TYRE]" .)

I've seen this clue in The Irish Independent.

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