Off-peak drop in crew members vehicle oddly ignored (6)
I believe the answer is:
abseil
'off-peak drop' is the definition.
'abseil' can be an answer for 'drop' (abseiling is dropping down a surface). I am unsure of the 'off-peak' bit.
'crew members vehicle oddly ignored' is the wordplay.
'crew members' becomes 'abs' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'oddly ignored' indicates alternate letters (letters in odd-numbered positions removed).
The alternating letters of 'vehicle' are 'eil'.
'abs'+'eil'='ABSEIL'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for abseil that I've seen before include "Climb down using a double rope" , "Use a rope to climb down a mountain" , "Descend rock face on rope" , "Descend using running rope" , "go down the line" .)