Sadly pensive husband leaving game, for unhurried lunch, primarily (7)

I believe the answer is:

wistful

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'sadly pensive' is the definition.
(I've seen this before)

'game for unhurried lunch primarily' is the wordplay.
'game' becomes 'wist' (I am not sure about this - if you are sure you should believe this answer much more).
'primarily' suggests taking the first letters.
The initial letters of 'for unhurried lunch' is 'ful'.
'wist'+'ful'='WISTFUL'

'husband leaving' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for wistful that I've seen before include "(Of a smile) showing vague or regretful longing" , "Disconsolate" , "Sadly pensive" , "Melancholy" , "Regretfully longing" .)

I've seen this clue in The Times.

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