Solo diner forced to plough through (7,2)

I believe the answer is:

soldier on

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'to plough through' is the definition.
I can't judge whether this defines the answer.

'solo diner forced' is the wordplay.
'forced' is an anagram indicator.
'solo'+'diner'='solodiner'
'solodiner' is an anagram of 'SOLDIER ON'.

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(Other definitions for soldier on that I've seen before include "Persevere (colloq.)" , "plug away" , "... to bear up" , "Keep struggling" , "Doggedly continue" .)

I've seen this clue in The Guardian.

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