Some tack, based on changes, going in opposite directions (9)

I believe the answer is:

nosebands

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'some tack' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'based on changes going in opposite directions' is the wordplay.
'changes' is an anagram indicator.
'going in' means one lot of letters goes inside another.
'opposite directions' becomes 'NS' (opposite compass points).
'based'+'on'='basedon'
'basedon' is an anagram of 'oseband'.
'oseband' inserted into 'ns' is 'NOSEBANDS'.

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I've seen this clue in The Times.

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