Gaining ground she put husband in losing position (7,3,4)

I believe the answer is:

getting the push

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'losing position' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'gaining ground she put husband' is the wordplay.
'gaining' becomes 'getting' (I can't justify this - if you can you should give a lot more credence to this answer).
'ground' is an anagram indicator ('grind' the letters into a new form).
'husband' becomes 'h'.
'she'+'put'='sheput'
'sheput' anagrammed gives 'thepus'.
'getting'+'thepus'+'h'='GETTING THE PUSH'

'in' is the link.

Can you help me to learn more?

I've seen this clue in The Times.

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