Crossword Genius

Follow something on an album (one with blood on?) (5)

Ross

I believe the answer is:

track

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

I cannot understand how the rest of the clue works.

(Other definitions for track that I've seen before include "path to follow" , "Parallel rails for wheels" , "Follow < course" , "Path; rails; circuit" , "Mark - line - groove" .)

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