Resilient European to remain in charge (7)
I believe the answer is:
elastic
'resilient' is the definition.
('elastic' can be similar in meaning to 'resilient')
'european to remain in charge' is the wordplay.
'european' becomes 'e' (abbreviation e.g. EU).
'to remain' becomes 'last'.
'in charge' becomes 'ic'.
'e'+'last'+'ic'='ELASTIC'
(Other definitions for elastic that I've seen before include "Pliable" , "Stretching tape" , "Able to stretch" , "Like one across" , "Material for bands" .)