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Increasingly tawdry stunt involving ambassador (7)

Ross

I believe the answer is:

cheaper

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'increasingly tawdry' is the definition.
I can't tell whether this defines the answer.

'stunt involving ambassador' is the wordplay.
'stunt' becomes 'caper' (I've seen this in another clue).
'involving' indicates putting letters inside.
'ambassador' becomes 'HE' (His or Her Excellency).
'caper' enclosing 'he' is 'CHEAPER'.

Can you help me to learn more?

(Other definitions for cheaper that I've seen before include "causing less damage" , "Not as dear" , "more affordable" , "Less expensive or tasteful" , "Comparatively despicable" .)

I've seen this clue in The Times.
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