### Clue: Raise for worker briefly entering enclosure close to crocodile (7)
### Answer: ENHANCE 
 ### Explanation: Definition: Raise
 "hand"(a worker, especially engaged in manual work) **minus its last letter**(briefly) **contained in**(entering) ENC(abbrev. for "enclosure", to indicate document(s) included with a letter) + **the last letter of**(close to) "crocodile".