In the vanguard ought you to appear valiant? (7)
I believe the answer is:
doughty
'valiant?' is the definition.
(I've seen this before)
'in the vanguard ought you to' is the wordplay.
'in' indicates a hidden word.
'DOUGHTY' is hidden within 'vanguard ought you to'.
'appear' acts as a link.
This may not be right. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for doughty that I've seen before include "Brave, resolute (arch.)" , "Stout-hearted, valiant" , "Fearless" .)