Search is around country for underwear (12)

I believe the answer is:

combinations

'for underwear' is the definition.
(combinations means an old-fashioned undergarment)

'search is around country' is the wordplay.
'search' becomes 'comb' (combing is a kind of searching).
'around' means one lot of letters goes inside another.
'country' becomes 'nation' (synonyms).
'is' going around 'nation' is 'inations'.
'comb'+'inations'='COMBINATIONS'

I've seen this clue in The Telegraph.

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