Man seizing power in country (5)
I believe the answer is:
nepal
'country' is the definition.
(Nepal is an example)
'man seizing power' is the wordplay.
'man' becomes 'neal' ().
'seizing' indicates putting letters inside (inserted letters are seized).
'power' becomes 'p' (symbol in physics).
'neal' placed around 'p' is 'NEPAL'.
'in' acts as a link.
(Other definitions for nepal that I've seen before include "Hindu kingdom in south Asia" , "Country in plane north-west of India" , "Country in the Himalayas, capital Katmandu" , "place in the mountains ..." , "Small lake" .)