Having fewer ties is really great (9)

I believe the answer is:

boundless

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'ties is really great' is the definition.
I can't tell whether this defines the answer.

'having fewer' is the wordplay.
'having' becomes 'bound' (I can't justify this - if you can you should believe this answer much more).
'fewer' becomes 'less' (associated in meaning).
'bound'+'less'='BOUNDLESS'

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(Other definitions for boundless that I've seen before include "Unlimited" , "Seemingly without limit" , "Having no limit, extensive" , "Without limits" .)

I've seen this clue in the Evening Standard.

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