Trailer’s need to boast lead stopping combat (3,3)

I believe the answer is:

tow bar

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'trailer's need' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'to boast lead stopping combat' is the wordplay.
'lead' indicates taking the first letters.
'stopping' indicates putting letters inside (stopping can mean blocking a gap).
'combat' becomes 'war' (I've seen this before).
The first letter of 'boast' is 'b'.
'b' put inside 'war' is 'wbar'.
'to'+'wbar'='TOW BAR'

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I've seen this clue in the Sydney Morning Herald.

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