Bonnie Langford's style (4)
I believe the answer is:
elan
'style' is the definition.
(I know that style can be written as elan)
'bonnie langford's' is the wordplay.
'ELAN' is hidden in amongst the letters.
But, I am unsure how the hidden word is indicated.
(Other definitions for elan that I've seen before include "Flamboyance" , "Combination of style and vigour" , "Energy, style and enthusiasm" , "Verve and dash" , "Vigour, style, enthusiasm" .)