Brother touching wife's forehead (4)

I believe the answer is:

brow

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'forehead' is the definition.
(synonyms)

'brother touching wife's' is the wordplay.
'brother' becomes 'bro' (short for brother).
'touching wife' becomes 'w' (abbreviation. I am not sure about the 'touching' bit.).
'bro'+'w'='BROW'

Can you help me to learn more?

(Other definitions for brow that I've seen before include "Forehead or hill summit" , "Forehead - hilltop" , "Forehead, sometimes knitted" , "Summit of a hill/pass" , "intellectual level" .)

I've seen this clue in The Independent.

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