Inflexible end delivered (8)

I believe the answer is:

stubborn

'inflexible' is the definition.
(I've seen this before)

'end delivered' is the wordplay.
'end' becomes 'stub' (I've seen this before).
'delivered' becomes 'born'.
'stub'+'born'='STUBBORN'

(Other definitions for stubborn that I've seen before include "Sticky" , "Determined" , "Showing dogged determination" , "Rigid" , "Unwilling to yield or grant a point" .)

I've seen this clue in The Telegraph.

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