Call for blood from unbelievable yahoo oddly (5-2)
I believe the answer is:
tally-ho
'call for blood' is the definition.
'tally ho' can be an answer for 'call' (I've seen this before). I'm not certain of the 'for blood' bit.
'unbelievable yahoo oddly' is the wordplay.
'unbelievable' becomes 'tall' (e.g. 'a tall story').
'oddly' indicates alternate letters (letters in the odd-numbered positions are used).
The alternating letters of 'yahoo' are 'yho'.
'tall'+'yho'='TALLY-HO'
'from' acts as a link.
Can you help me to learn more?
(Other definitions for tally-ho that I've seen before include "Hunt cry" , "Hunting cry when a fox is sighted" , ""I've seen the fox!"" , "Fox-hunting cry" , "Come on, hounds!" .)